Test sidekiq specs

[sarahchen6]

What does this PR do?
Attempt to address the flaky sidekiq tests that fail with Connection refused - connect(2) for 127.0.0.1:6379 (Errno::ECONNREFUSED) by forcing a redis host over localhost. Did not work though.

Motivation:
Reduce CI flakiness, and re-enable our GHA specs (issue)!

Change log entry
None.

Additional Notes:
Issue: https://github.com/DataDog/ruby-guild/issues/51.

How to test the change?
Consistently green CI.

[github-actions]

Thank you for updating Change log entry section 👏

^{Visited at: 2025-02-14 20:23:46 UTC}

[datadog-datadog-prod-us1]

Datadog Report

Branch report: sarahchen6/experiment-with-sidekiq
Commit report: 3f56051
Test service: dd-trace-rb

✅ 0 Failed, 22372 Passed, 1387 Skipped, 3m 12.79s Total Time

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.74%. Comparing base (887e26d) to head (3f56051).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4392      +/-   ##
==========================================
+ Coverage   97.71%   97.74%   +0.03%     
==========================================
  Files        1353     1353              
  Lines       82925    82975      +50     
  Branches     4209     4213       +4     
==========================================
+ Hits        81028    81102      +74     
+ Misses       1897     1873      -24     

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[pr-commenter]

Benchmarks

Benchmark execution time: 2025-02-14 20:48:10

Comparing candidate commit 3f56051 in PR branch sarahchen6/experiment-with-sidekiq with baseline commit 887e26d in branch master.

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