Transport wip

[p-datadog]

What does this PR do?

Motivation:

Change log entry

Additional Notes:

How to test the change?

[github-actions]

👋 Hey @p-datadog, please fill "Change log entry" section in the pull request description.

If changes need to be present in CHANGELOG.md you can state it this way

**Change log entry**

Yes. A brief summary to be placed into the CHANGELOG.md

(possible answers Yes/Yep/Yeah)

Or you can opt out like that

**Change log entry**

None.

(possible answers No/Nope/None)

^{Visited at: 2025-03-11 21:45:03 UTC}

[datadog-datadog-prod-us1]

Datadog Report

Branch report: transport-dry-3
Commit report: 71618a4
Test service: dd-trace-rb

✅ 0 Failed, 20630 Passed, 1459 Skipped, 3m 18.28s Total Time

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-03-12 14:36:25

Comparing candidate commit 71618a4 in PR branch transport-dry-3 with baseline commit 65b2901 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 31 metrics, 2 unstable metrics.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 98.37398% with 2 lines in your changes missing coverage. Please review.

Project coverage is 97.73%. Comparing base (65b2901) to head (71618a4).
Report is 26 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/datadog/core/remote/transport/http/config.rb	66.66%	1 Missing ⚠️
.../datadog/core/remote/transport/http/negotiation.rb	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4480      +/-   ##
==========================================
+ Coverage   97.70%   97.73%   +0.03%     
==========================================
  Files        1379     1382       +3     
  Lines       83881    83827      -54     
  Branches     4251     4231      -20     
==========================================
- Hits        81953    81929      -24     
+ Misses       1928     1898      -30     

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