[confighttp] Add support for configuring compression levels

[rnishtala-sumo]

Description

Add the option of configuring compression levels. This is not intended to be a breaking change for the user.

Link to tracking issue

Issue - #10467

Testing

Unit tests were added/changed

[codecov]

Codecov Report

Attention: Patch coverage is 94.73684% with 4 lines in your changes missing coverage. Please review.

Project coverage is 91.61%. Comparing base (71aae79) to head (683df97).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
config/confighttp/compressor.go	89.47%	3 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #11805   +/-   ##
=======================================
  Coverage   91.60%   91.61%           
=======================================
  Files         456      456           
  Lines       24086    24139   +53     
=======================================
+ Hits        22064    22114   +50     
- Misses       1649     1651    +2     
- Partials      373      374    +1     

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[rnishtala-sumo]

@dmitryax this latest commit has all the changes from the most recent review.

[rnishtala-sumo]

@dmitryax please let me know if there are any other changes that you'd like to see!

[github-actions]

This PR was marked stale due to lack of activity. It will be closed in 14 days.

[rnishtala-sumo]

@axw I appreciate the review. If possible, I'd also like @dmitryax or @open-telemetry/collector-approvers to chime in before I implement these changes.

[rnishtala-sumo]

@axw @dmitryax @Aneurysm9
I think I've addressed/resolved most conversations in this PR. Do we think this is close to being ready?

[axw]

Thanks for iterating, LGTM

[jmacd]

Recommend changing the PR title to emphasize that this is being addressed for HTTP configurations, not gRPC.

FYI the OTel-Arrow project also addressed this problem for itself internally on the gRPC path, and I think it would be worth planning for HTTP and gRPC configurations to do the same.

Please see https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/internal/otelarrow/compression, which has support for both exporter- and receiver- side configuration of the Zstd compressor.