feat: add a bunch (but not all) of aspects for os.path

[juanjux]

Note: this branches from #9113 so it will be easier to review once that PR has been merged.

Description

Implements the aspects for all functions in the os.path module that split a string into parts (plus normpath because it's trivial):

• os.path.split
• os.path.splitext
• os.path.basename
• os.path.dirname
• os.path.normcase
• os.path.splitdrive
• os.path.splitroot

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.

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

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-04-29 17:33:16

Comparing candidate commit a58221d in PR branch juanjux/APPSEC-11369-ospath-splitters-propagation with baseline commit 02f7908 in branch main.

Found 5 performance improvements and 5 performance regressions! Performance is the same for 191 metrics, 9 unstable metrics.

scenario:sethttpmeta-collectipvariant_exists

• 🟥 max_rss_usage [+750.894KB; +821.970KB] or [+3.596%; +3.937%]

scenario:sethttpmeta-no-collectipvariant

• 🟥 max_rss_usage [+697.151KB; +777.818KB] or [+3.339%; +3.725%]

scenario:sethttpmeta-obfuscation-disabled

• 🟩 max_rss_usage [-783.151KB; -702.468KB] or [-3.614%; -3.242%]

scenario:sethttpmeta-obfuscation-no-query

• 🟥 max_rss_usage [+723.989KB; +805.048KB] or [+3.467%; +3.855%]

scenario:sethttpmeta-obfuscation-regular-case-explicit-query

• 🟩 max_rss_usage [-1001.260KB; -934.919KB] or [-4.581%; -4.278%]

scenario:sethttpmeta-obfuscation-regular-case-implicit-query

• 🟩 max_rss_usage [-911.027KB; -830.183KB] or [-4.180%; -3.809%]

scenario:sethttpmeta-useragentvariant_exists_2

• 🟩 max_rss_usage [-800.366KB; -719.659KB] or [-3.697%; -3.324%]

scenario:sethttpmeta-useragentvariant_exists_3

• 🟩 max_rss_usage [-779.337KB; -702.186KB] or [-3.599%; -3.243%]

scenario:sethttpmeta-useragentvariant_not_exists_2

• 🟥 max_rss_usage [+523.616KB; +590.906KB] or [+2.490%; +2.810%]

scenario:tracer-medium

• 🟥 max_rss_usage [+953.107KB; +1038.368KB] or [+4.691%; +5.111%]

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 414 lines in your changes are missing coverage. Please review.

Project coverage is 6.59%. Comparing base (a331454) to head (06efa71).

Files	Patch %	Lines
tests/appsec/iast/aspects/test_ospath_aspects.py	0.00%	323 Missing ⚠️
...ppsec/iast/aspects/test_ospath_aspects_fixtures.py	0.00%	57 Missing ⚠️
...s/appsec/iast/fixtures/aspects/module_functions.py	0.00%	14 Missing ⚠️
ddtrace/appsec/_iast/_taint_tracking/__init__.py	0.00%	8 Missing ⚠️
ddtrace/appsec/_iast/_taint_tracking/aspects.py	0.00%	7 Missing ⚠️
ddtrace/appsec/_iast/_ast/visitor.py	0.00%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #9114       +/-   ##
===========================================
- Coverage   78.38%    6.59%   -71.80%     
===========================================
  Files        1265     1235       -30     
  Lines      119065   117602     -1463     
===========================================
- Hits        93334     7755    -85579     
- Misses      25731   109847    +84116     

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[datadog-dd-trace-py-rkomorn]

Datadog Report

Branch report: juanjux/APPSEC-11369-ospath-splitters-propagation
Commit report: 06efa71
Test service: dd-trace-py

✅ 0 Failed, 109167 Passed, 3420 Skipped, 11m 9.75s Total duration (32m 38.8s time saved)