Add benchmark for log correlation

[marcotc]

Follow up to #3474

What does this PR do?

Adds a benchmark that measures the process of generating a log correlation information from an active trace.
This happens whenever a log line is generated in a traced application.

Additional Notes:

How to test the change?

For Datadog employees:

• If this PR touches code that signs or publishes builds or packages, or handles
  credentials of any kind, I've requested a review from @DataDog/security-design-and-guidance.
• This PR doesn't touch any of that.

Unsure? Have a question? Request a review!

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-02-22 23:05:07

Comparing candidate commit 181eba4 in PR branch bm-log_correlation with baseline commit 4249600 in branch bm-digest.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 7 metrics, 1 unstable metrics.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.07%. Comparing base (4249600) to head (181eba4).
Report is 1 commits behind head on bm-digest.

Additional details and impacted files

@@            Coverage Diff             @@
##           bm-digest    #3476   +/-   ##
==========================================
  Coverage      98.07%   98.07%           
==========================================
  Files           1235     1235           
  Lines          71980    71980           
  Branches        3393     3393           
==========================================
  Hits           70595    70595           
  Misses          1385     1385           

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