Update cluster command APIs to make it easier to fix list/struct support in commands

[bzbarsky-apple]

Review Note: Reviewing the commits individually is probably much nicer than reviewing the whole thing at once.

Problem

There are a few things this is laying the groundwork for:

1. Simpler/saner encoding of responses to commands, using the ConcreteCommandPath this PR is adding and the command field structs that still need to be generated.
2. Moving toward not needing to change cluster command callback signatures if something changes about the command fields, by encapsulating the fields in the "fields" struct.

Change overview

1. Introduce a ConcreteCommandPath struct that represents what it's called. This will likely replace CommandPathParams in a bunch of places later on.
2. Modify coden templates to work with the new function signatures.
3. Modify cluster implementations to have the new function signatures.

Testing

No intended behavior changes. Certification tests still pass locally.

[bzbarsky-apple]

@mrjerryjohns @erjiaqing @msandstedt @saurabhst @jepenven-silabs @jmartinez-silabs @LuDuda Please take a look?

[bzbarsky-apple]

Changes to address Jerry's review comments.

[github-actions]

Size increase report for "gn_qpg-example-build" from db999f7

File	Section	File	VM
chip-qpg6100-lighting-example.out	.text	672	672

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-qpg6100-lighting-example.out and ./pull_artifact/chip-qpg6100-lighting-example.out:

sections,vmsize,filesize
.debug_info,0,94893
.debug_str,0,6919
.strtab,0,6333
.debug_line,0,3751
.debug_loc,0,1681
.text,672,672
.debug_abbrev,0,532
.debug_frame,0,88
.symtab,0,16
.shstrtab,0,3
.debug_ranges,0,-152
[Unmapped],0,-672

Comparing ./master_artifact/chip-qpg6100-lighting-example.out.map and ./pull_artifact/chip-qpg6100-lighting-example.out.map:

BLOAT EXECUTION FAILED WITH CODE 1:
bloaty: unknown file type for file './pull_artifact/chip-qpg6100-lighting-example.out.map'

[github-actions]

Size increase report for "esp32-example-build" from db999f7

File	Section	File	VM
chip-all-clusters-app.elf	.flash.text	744	744

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-all-clusters-app.elf and ./pull_artifact/chip-all-clusters-app.elf:

sections,vmsize,filesize
.debug_info,0,154259
.debug_str,0,12994
.strtab,0,11578
.debug_line,0,7862
.debug_loc,0,5879
.debug_abbrev,0,990
.flash.text,744,744
.debug_ranges,0,712
.shstrtab,0,-2
.debug_frame,0,-44
[Unmapped],0,-744

[github-actions]

Size increase report for "nrfconnect-example-build" from db999f7

File	Section	File	VM
chip-lock.elf	text	368	368

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-shell.elf and ./pull_artifact/chip-shell.elf:

sections,vmsize,filesize

Comparing ./master_artifact/chip-lock.elf and ./pull_artifact/chip-lock.elf:

sections,vmsize,filesize
.debug_info,0,82515
.debug_str,0,4168
.strtab,0,3581
.debug_line,0,2719
.debug_abbrev,0,618
text,368,368
.debug_loc,0,184
.debug_frame,0,92
.symtab,0,16
.shstrtab,0,3
.debug_ranges,0,-88