chore(iast): fix propagation for `platformdirs`

[gnufede]

IAST: Removes the detection and later patching skipping of loaded third-party modules. This change increases the coverage of propagation, so only Python standard libraries (Python batteries) and the ones included in the deny list are not patched.

Checklist

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

Reviewer Checklist

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

[datadog-dd-trace-py-rkomorn[bot]]

Datadog Report

Branch report: gnufede/APPSEC-53675-fix-propagation-platformdirs-rsa Commit report: bbaadc4 Test service: dd-trace-py

:white_check_mark: 0 Failed, 112678 Passed, 1003 Skipped, 50m 17.43s Total duration (9m 1.65s time saved)

[pr-commenter[bot]]

Benchmarks

Benchmark execution time: 2024-06-25 12:42:29

Comparing candidate commit 7f3578862e88f74e80e3d61d44e544516eee5c1e in PR branch gnufede/APPSEC-53675-fix-propagation-platformdirs-rsa with baseline commit 0babcb1198f754f6cd37fda7d00287bef8110e1c in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 221 metrics, 9 unstable metrics.