New immutable type for Flags structs

[bogdandrutu]

PR will fail the "Check" stage since I manually change the generated code.

Signed-off-by: Bogdan [email protected]

[codecov]

Codecov Report

Merging #5970 (2a73ea0) into main (7545a29) will decrease coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #5970      +/-   ##
==========================================
- Coverage   92.30%   92.26%   -0.05%     
==========================================
  Files         212      214       +2     
  Lines       13263    13269       +6     
==========================================
- Hits        12243    12242       -1     
- Misses        803      810       +7     
  Partials      217      217              

Impacted Files	Coverage Δ
pdata/plog/logs.go	83.87% <ø> (-6.52%)	⬇️
pdata/pcommon/trace_flags.go	100.00% <100.00%> (ø)
pdata/plog/generated_logs.go	96.79% <100.00%> (+0.02%)	⬆️
pdata/plog/log_record_flags.go	100.00% <100.00%> (ø)
pdata/internal/wrapper_logs.go	69.56% <0.00%> (-30.44%)	⬇️

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[bogdandrutu]

Dropping this in favor of the simpler API in #5972, still if interested review this to understand the logic.