Add missing RC capabilities

[zarirhamza]

This PR reports dynamic configuration capabilities that are already supported, but were not reported as such. These missing capabilities are: APM_TRACING_SAMPLE_RATE, APM_TRACING_LOGS_INJECTION, APM_TRACING_HTTP_HEADER_TAGS.

How to test the change?
System tests have been enabled for these capabilities: DataDog/system-tests#3011

Unsure? Have a question? Request a review!

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-09-11 15:55:47

Comparing candidate commit ee1a9ff in PR branch zarir/rc-config-add with baseline commit bc84181 in branch master.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 23 metrics, 2 unstable metrics.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.86%. Comparing base (bc84181) to head (ee1a9ff).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3888      +/-   ##
==========================================
+ Coverage   97.84%   97.86%   +0.01%     
==========================================
  Files        1279     1279              
  Lines       76530    76529       -1     
  Branches     3752     3752              
==========================================
+ Hits        74883    74893      +10     
+ Misses       1647     1636      -11     

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