ci: skip forkserver multiprocessing profiling test because it is unreliable

[emmettbutler]

This change fixes CI failures like this one by skipping the test.

Checklist

• Change(s) are motivated and described in the PR description
• Testing strategy is described if automated tests are not included in the PR
• Risks are described (performance impact, potential for breakage, maintainability)
• Change is maintainable (easy to change, telemetry, documentation)
• Library release note guidelines are followed or label changelog/no-changelog is set
• Documentation is included (in-code, generated user docs, public corp docs)
• Backport labels are set (if applicable)
• If this PR changes the public interface, I've notified @DataDog/apm-tees.
• If change 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.

Reviewer Checklist

• Title is accurate
• All changes are related to the pull request's stated goal
• Description motivates each change
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Change is maintainable (easy to change, telemetry, documentation)
• Release note makes sense to a user of the library
• Author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[datadog-dd-trace-py-rkomorn]

Datadog Report

Branch report: emmett.butler/flaky-forkserver
Commit report: ec1803b
Test service: dd-trace-py

✅ 0 Failed, 151885 Passed, 20898 Skipped, 10h 30m 20.01s Total duration (1h 40m 13.21s time saved)

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-03-28 21:00:57

Comparing candidate commit ec1803b in PR branch emmett.butler/flaky-forkserver with baseline commit 8ab2d72 in branch main.

Found 5 performance improvements and 2 performance regressions! Performance is the same for 194 metrics, 9 unstable metrics.

scenario:flasksimple-debugger

• 🟥 execution_time [+323.483µs; +376.327µs] or [+5.146%; +5.987%]

scenario:httppropagationextract-large_header_no_matches

• 🟩 max_rss_usage [-763.141KB; -693.806KB] or [-3.488%; -3.171%]

scenario:httppropagationextract-medium_header_no_matches

• 🟩 max_rss_usage [-757.848KB; -681.487KB] or [-3.468%; -3.119%]

scenario:httppropagationextract-none_propagation_style

• 🟩 max_rss_usage [-1026.372KB; -705.007KB] or [-4.688%; -3.220%]

scenario:httppropagationextract-wsgi_invalid_trace_id_header

• 🟥 max_rss_usage [+528.252KB; +720.209KB] or [+2.502%; +3.411%]

scenario:httppropagationextract-wsgi_large_header_no_matches

• 🟩 max_rss_usage [-750.678KB; -667.357KB] or [-3.432%; -3.051%]

scenario:httppropagationextract-wsgi_medium_header_no_matches

• 🟩 max_rss_usage [-774.196KB; -702.002KB] or [-3.537%; -3.208%]