[AspNetCore+Http] StatusCode boxing logic improvements

[CodeBlanch]

Changes

• Updates AspNetCore to use an array for better perf. See: [http] Avoid boxing of status code tags #4361
• Make sure the static ctor is invoked during build so the first request isn't impacted. See: https://github.com/open-telemetry/opentelemetry-dotnet/pull/4361/files#r1157847934

Merge requirement checklist

• CONTRIBUTING guidelines followed (nullable enabled, static analysis, etc.)
• Appropriate CHANGELOG.md files updated for non-trivial changes

[codecov]

Codecov Report

Merging #4363 (d5aba59) into main (6c06bcc) will decrease coverage by 0.08%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4363      +/-   ##
==========================================
- Coverage   84.81%   84.74%   -0.08%     
==========================================
  Files         300      300              
  Lines       12065    12003      -62     
==========================================
- Hits        10233    10172      -61     
+ Misses       1832     1831       -1     

Impacted Files	Coverage Δ
...rumentation.Http/Implementation/TelemetryHelper.cs	100.00% <ø> (ø)
...ation.AspNetCore/Implementation/TelemetryHelper.cs	85.71% <100.00%> (-12.92%)	⬇️
...ation.AspNetCore/MeterProviderBuilderExtensions.cs	100.00% <100.00%> (ø)
...tion.AspNetCore/TracerProviderBuilderExtensions.cs	100.00% <100.00%> (ø)
...rumentation.Http/MeterProviderBuilderExtensions.cs	100.00% <100.00%> (ø)
...umentation.Http/TracerProviderBuilderExtensions.cs	100.00% <100.00%> (ø)

... and 1 file with indirect coverage changes