fix(iast): backport fix from 10706 to 2.12

[juanjux]

Description

Partial backport of the Initializer atexit fix from #10706.

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, 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: juanjux/backport-10706-to-212
Commit report: 418f26a
Test service: dd-trace-py

✅ 0 Failed, 113199 Passed, 728 Skipped, 33m 22.11s Total duration (4m 51.34s time saved)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (2.12@ef14a85). Learn more about missing BASE report.

Additional details and impacted files

@@           Coverage Diff           @@
##             2.12   #10736   +/-   ##
=======================================
  Coverage        ?    9.85%           
=======================================
  Files           ?     1410           
  Lines           ?   120861           
  Branches        ?        0           
=======================================
  Hits            ?    11914           
  Misses          ?   108947           
  Partials        ?        0           

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[pr-commenter]

Benchmarks

Benchmark execution time: 2024-09-20 09:05:07

Comparing candidate commit 418f26a in PR branch juanjux/backport-10706-to-212 with baseline commit ef14a85 in branch 2.12.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 353 metrics, 47 unstable metrics.