chore: hide chained loader methods from tracebacks

[P403n1x87]

The tracebacks arising from import errors include many intermediate frames generated by the import hook machinery that we implement in our module watchdog solution to intercept module imports. Before reraising any import errors, we try to modify the traceback to remove our shim methods to reduce the noise generated in logs.

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

[github-actions]

CODEOWNERS have been resolved as:

tests/submod/import_test.py                                             @DataDog/apm-core-python
ddtrace/internal/module.py                                              @DataDog/debugger-python @DataDog/apm-core-python
tests/internal/test_module.py                                           @DataDog/debugger-python @DataDog/apm-core-python

[datadog-dd-trace-py-rkomorn]

Datadog Report

Branch report: chore/hide-chained-loader-frames-from-tb
Commit report: def4836
Test service: dd-trace-py

✅ 0 Failed, 87 Passed, 1468 Skipped, 4m 2.54s Total duration (36m 23.82s time saved)

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-01-22 12:40:53

Comparing candidate commit def4836 in PR branch chore/hide-chained-loader-frames-from-tb with baseline commit 30e3b76 in branch main.

Found 0 performance improvements and 1 performance regressions! Performance is the same for 393 metrics, 2 unstable metrics.

scenario:iast_aspects-ospathsplit_aspect

• 🟥 execution_time [+462.022ns; +528.613ns] or [+12.025%; +13.758%]

[mabdinur]

This is great! Can we also add a release note and a unittest?