[api-logs] Removed default parameter from the EmitLog API

[CodeBlanch]

Relates to #4433

See #4552 (comment)

Changes

• Updates the EmitLog API so that it doesn't use default parameters

Merge requirement checklist

• CONTRIBUTING guidelines followed (nullable enabled, static analysis, etc.)

[codecov]

Codecov Report

Merging #4559 (e961daa) into main (f786f59) will decrease coverage by 0.05%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4559      +/-   ##
==========================================
- Coverage   85.23%   85.18%   -0.05%     
==========================================
  Files         320      320              
  Lines       12677    12678       +1     
==========================================
- Hits        10805    10800       -5     
- Misses       1872     1878       +6     

Impacted Files	Coverage Δ
src/OpenTelemetry.Api/Logs/NoopLogger.cs	66.66% <ø> (ø)
.../OpenTelemetry/Logs/ILogger/OpenTelemetryLogger.cs	87.73% <ø> (ø)
src/OpenTelemetry/Logs/LoggerSdk.cs	100.00% <ø> (ø)
src/OpenTelemetry.Api/Logs/Logger.cs	100.00% <100.00%> (ø)

... and 3 files with indirect coverage changes