[repo] Small cleanup/simplification

[pentp]

Some basic cleanup and simplification.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: pentp / name: Pent Ploompuu (a1222b4, edce40b, 4212345, 6b54e75, c48b0ec, 3593cee)
• ✅ login: Kielek / name: Piotr Kiełkowicz (2901157)

[CodeBlanch]

@pentp There's some stuff on here I would be happy to merge. Like adding readonly or simplifying lambdas, etc. There's other stuff I think we need to look at more closely like switching from Interlocked to Volatile. Would you be willing to split up this PR?

[github-actions]

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[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.36%. Comparing base (0c26ce2) to head (2901157).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6048      +/-   ##
==========================================
- Coverage   86.37%   86.36%   -0.02%     
==========================================
  Files         257      257              
  Lines       11622    11584      -38     
==========================================
- Hits        10039    10005      -34     
+ Misses       1583     1579       -4     

Files with missing lines	Coverage Δ
...endencyInjectionLoggerProviderBuilderExtensions.cs	100.00% <ø> (ø)
...pendencyInjectionMeterProviderBuilderExtensions.cs	100.00% <ø> (ø)
...endencyInjectionTracerProviderBuilderExtensions.cs	100.00% <ø> (ø)
...emetry.Api/Internal/OpenTelemetryApiEventSource.cs	80.64% <ø> (-0.61%)	⬇️
src/OpenTelemetry.Api/Trace/TracerProvider.cs	93.75% <ø> (-0.19%)	⬇️
...torage/PersistentStorageAbstractionsEventSource.cs	40.00% <ø> (-10.00%)	⬇️
.../PersistentStorage/PersistentStorageEventSource.cs	44.89% <ø> (-1.11%)	⬇️
...ing/Implementation/HostingExtensionsEventSource.cs	100.00% <ø> (ø)
...nTelemetry/Internal/OpenTelemetrySdkEventSource.cs	79.13% <ø> (-0.18%)	⬇️
src/OpenTelemetry/Logs/LogRecord.cs	70.19% <ø> (-0.59%)	⬇️
... and 7 more