Fix modutils._get_relative_base_path returns incorrect result when directory name starts with directory name in path_to_check

[pavan-msys]

Type of Changes

	Type
✓	🐛 Bug fix

Description

This PR fixes a bug in astroid.modutils._get_relative_base_path where the function would incorrectly return a partial subpath if the target path started with the same prefix as path_to_check, but was not actually a subdirectory.

Closes #2608

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 2 lines in your changes missing coverage. Please review.

Project coverage is 93.27%. Comparing base (30128b7) to head (f127d53).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
astroid/modutils.py	85.71%	2 Missing ⚠️

❌ Your patch check has failed because the patch coverage (85.71%) is below the target coverage (100.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2756      +/-   ##
==========================================
- Coverage   93.29%   93.27%   -0.03%     
==========================================
  Files          93       93              
  Lines       11085    11090       +5     
==========================================
+ Hits        10342    10344       +2     
- Misses        743      746       +3     

Flag	Coverage Δ
linux	93.13% <85.71%> (-0.03%)	⬇️
pypy	93.27% <85.71%> (-0.03%)	⬇️
windows	93.25% <85.71%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
astroid/modutils.py	88.65% <85.71%> (-0.86%)	⬇️

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.