feat(opentelemetry-config): add backups for compression, timeout, headers

[JamieDanielson]

Which problem is this PR solving?

• Updates Add all fallback options for config model #5945

Short description of the changes

Add fallback options to EnvironmentConfigProvider for OTEL_EXPORTER_OTLP_COMPRESSION, OTEL_EXPORTER_OTLP_TIMEOUT, OTEL_EXPORTER_OTLP_HEADERS.

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• unit test

Checklist:

• Followed the style guidelines of this project
• Unit tests have been added

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.16%. Comparing base (74f470e) to head (7b202d9).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6058   +/-   ##
=======================================
  Coverage   95.16%   95.16%           
=======================================
  Files         316      316           
  Lines        9198     9207    +9     
  Branches     2057     2075   +18     
=======================================
+ Hits         8753     8762    +9     
  Misses        445      445           

Files with missing lines	Coverage Δ
...try-configuration/src/EnvironmentConfigProvider.ts	100.00% <100.00%> (ø)

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