fix(debugger): max match in probe file resolution [backport 4.0]

[dd-octo-sts]

Backport 953ef8b from #15143 to 4.0.

Description

We change the probe source file path matching logic to return the longest matching path instead of the first result. This deals with cases where sources with the same name can be found on different entries of the Python path.

Testing

[github-actions]

CODEOWNERS have been resolved as:

releasenotes/notes/debugging-probe-source-file-resolution-bd73a5fd172c3711.yaml  @DataDog/apm-python
ddtrace/debugging/_probe/model.py                                       @DataDog/debugger-python
tests/debugging/probe/test_model.py                                     @DataDog/debugger-python

[github-actions]

Bootstrap import analysis

Comparison of import times between this PR and base.

Summary

The average import time from this PR is: 245 ± 2 ms.

The average import time from base is: 248 ± 2 ms.

The import time difference between this PR and base is: -2.35 ± 0.1 ms.

Import time breakdown

The following import paths have shrunk:

ddtrace.auto 2.060 ms (0.84%)

ddtrace.bootstrap.sitecustomize 1.372 ms (0.56%)

ddtrace.bootstrap.preload 1.372 ms (0.56%)

ddtrace.internal.remoteconfig.client 0.644 ms (0.26%)

ddtrace 0.687 ms (0.28%)

ddtrace.internal._unpatched 0.028 ms (0.01%)

json 0.028 ms (0.01%)

json.decoder 0.028 ms (0.01%)

re 0.028 ms (0.01%)

enum 0.028 ms (0.01%)

types 0.028 ms (0.01%)

[emmettbutler]

force-merging because tests have run, just waiting on microbenchmarks