feature: modify i2s interface/implementation to better match spec

[deadprogram]

This PR modifies the i2s interface/implementation on SAMD21 to better match the i2s specification.

Based on some learning from implementation for rp2040 pio in tinygo-org/pio#14

[github-actions]

Size difference with the dev branch:

Binary size difference

drivers/sizes-dev.txt has more commands than drivers/sizes-pr.txt
    tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/microphone/main.go
 flash                          ram
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  16716   16716      0   0.00%    4172    4172      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-rp2040 ./examples/adafruit4650
  61472   61472      0   0.00%    6180    6180      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/adt7410/main.go
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  13568   13568      0   0.00%    6788    6788      0   0.00% tinygo build -size short -o ./build/test.hex -target=pybadge ./examples/amg88xx
   8680    8680      0   0.00%    4740    4740      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/apa102/main.go
  11884   11884      0   0.00%    6580    6580      0   0.00% tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/apds9960/proximity/main.go
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   8368    8368      0   0.00%    2320    2320      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/at24cx/main.go
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  70632   70632      0   0.00%    3660    3660      0   0.00% tinygo build -size short -o ./build/test.hex -target=pinetime     ./examples/bma42x/main.go
  64012   64012      0   0.00%    6196    6196      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/bmi160/main.go
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  69304   69304      0   0.00%    6968    6968      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/flash/console/spi
  65644   65644      0   0.00%    9004    9004      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/flash/console/qspi
   7212    7212      0   0.00%    2280    2280      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/gc9a01/main.go
  67628   67628      0   0.00%    6360    6360      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-m0 ./examples/gps/i2c/main.go
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  10528   10528      0   0.00%    4748    4748      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/hd44780i2c/main.go
  14808   14808      0   0.00%    6580    6580      0   0.00% tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/hts221/main.go
  16148   16148      0   0.00%    2360    2360      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/hub75/main.go
  10152   10152      0   0.00%    6916    6916      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/basic
  10644   10644      0   0.00%    4868    4868      0   0.00% tinygo build -size short -o ./build/test.hex -target=xiao ./examples/ili9341/basic
  29508   29508      0   0.00%   38076   38076      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/pyportal_boing
  10172   10172      0   0.00%    6916    6916      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/ili9341/scroll
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  11732   11732      0   0.00%    4780    4780      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/lis3dh/main.go
  14152   14152      0   0.00%    6580    6580      0   0.00% tinygo build -size short -o ./build/test.hex -target=nano-33-ble ./examples/lps22hb/main.go
  26132   26132      0   0.00%    2328    2328      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/lsm303agr/main.go
  12448   12448      0   0.00%    4788    4788      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/lsm6ds3/main.go
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  27224   27224      0   0.00%    3632    3632      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/microbitmatrix/main.go
  26944   26944      0   0.00%    5680    5680      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit-v2 ./examples/microbitmatrix/main.go
   8240    8240      0   0.00%    4748    4748      0   0.00% tinygo build -size short -o ./build/test.hex -target=itsybitsy-m0 ./examples/mma8653/main.go
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  75640   75640      0   0.00%    7448    7448      0   0.00% tinygo build -size short -o ./build/test.hex -target=p1am-100 ./examples/p1am/main.go
  12256   12256      0   0.00%    3352    3352      0   0.00% tinygo build -size short -o ./build/test.hex -target=pico ./examples/pca9685/main.go
   6228    6228      0   0.00%    3288    3288      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/pcd8544/setbuffer/main.go
   5260    5260      0   0.00%    2280    2280      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/pcd8544/setpixel/main.go
  10540   10540      0   0.00%    3328    3328      0   0.00% tinygo build -size short -o ./build/test.hex -target=feather-rp2040 ./examples/seesaw
   2825    2825      0   0.00%     558     558      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino ./examples/servo
  13772   13772      0   0.00%    3400    3400      0   0.00% tinygo build -size short -o ./build/test.hex -target=pico     ./examples/sgp30
   8080    8080      0   0.00%    6788    6788      0   0.00% tinygo build -size short -o ./build/test.hex -target=pybadge ./examples/shifter/main.go
  57476   57476      0   0.00%    3684    3684      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/sht3x/main.go
  57532   57532      0   0.00%    3692    3692      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/sht4x/main.go
  57448   57448      0   0.00%    3684    3684      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/shtc3/main.go
   6688    6688      0   0.00%    2288    2288      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1306/i2c_128x32/main.go
   6140    6140      0   0.00%    2280    2280      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/ssd1306/spi_128x64/main.go
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   6788    6788      0   0.00%    2280    2280      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/st7735/main.go
   6700    6700      0   0.00%    2280    2280      0   0.00% tinygo build -size short -o ./build/test.hex -target=microbit ./examples/st7789/main.go
  16964   16964      0   0.00%    4740    4740      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-express ./examples/thermistor/main.go
  10604   10604      0   0.00%    4540    4540      0   0.00% tinygo build -size short -o ./build/test.hex -target=circuitplay-bluefruit ./examples/tone
  10064   10064      0   0.00%    4740    4740      0   0.00% tinygo build -size short -o ./build/test.hex -target=arduino-nano33 ./examples/tm1637/main.go
  10872   10872      0   0.00%    3340    3340      0   0.00% tinygo build -size short -o ./build/test.hex -target=pico ./examples/touch/capacitive
   9524    9524      0   0.00%    6780    6780      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/touch/resistive/fourwire/main.go
  12596   12596      0   0.00%    6976    6976      0   0.00% tinygo build -size short -o ./build/test.hex -target=pyportal ./examples/touch/resistive/pyportal_touchpaint/main.go
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   1056    1056      0   0.00%     180     180      0   0.00% tinygo build -size short -o ./build/test.hex -target=digispark ./examples/ws2812
  31856   31856      0   0.00%    4780    4780      0   0.00% tinygo build -size short -o ./build/test.hex -target=trinket-m0 ./examples/bme280/main.go
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[deadprogram]

Note that this PR includes #4652 to pass CI. So that one should be merged first, and this PR rebased.

[deadprogram]

Now rebased and ready for review.