[BUG] REGRESSION: v5 fails if a broken symlink is present in the repo

Describe the bug

CI fails with this error:

Traceback (most recent call last):
  File "codecov_cli/main.py", line 100, in <module>
  File "codecov_cli/main.py", line 96, in run
  File "click/core.py", line 1161, in __call__
  File "click/core.py", line 1082, in main
  File "click/core.py", line 1697, in invoke
  File "click/core.py", line 1443, in invoke
  File "click/core.py", line 788, in invoke
  File "click/decorators.py", line 33, in new_func
  File "codecov_cli/commands/upload_coverage.py", line 86, in upload_coverage
  File "click/core.py", line 788, in invoke
  File "codecov_cli/services/upload_coverage/__init__.py", line 52, in upload_coverage_logic
  File "codecov_cli/services/upload/__init__.py", line 104, in do_upload_logic
  File "codecov_cli/services/upload/upload_collector.py", line 194, in generate_upload_data
  File "codecov_cli/services/upload/upload_collector.py", line 104, in _produce_file_fixes
  File "codecov_cli/services/upload/upload_collector.py", line 118, in _get_file_fixes
FileNotFoundError: [Errno 2] No such file or directory: 'internal/integrationtest/compile_4/testdata/ValidSketchWithNonInoBrokenSketchFileSymlink/other_file.c'
[PYI-2973:ERROR] Failed to execute script 'main' due to unhandled exception!
==> Failed to run upload-coverage
    Exiting...

the "missing" file is a broken symlink that we use in our integration tests suite:

$ ls -l internal/integrationtest/compile_4/testdata/ValidSketchWithNonInoBrokenSketchFileSymlink/
total 4
lrwxrwxrwx 1 cmaglie cmaglie  6 feb 28 15:58 other_file.c -> broken
-rw-rw-r-- 1 cmaglie cmaglie 31 feb 28 15:58 ValidSketchWithNonInoBrokenSketchFileSymlink.ino

The best fix in our use case is to catch the "No such file or directory" exception and ignore it.

To Reproduce

I think you can reproduce the error by creating a broken link in the Git repository where a test CI is run.
For example, on Linux:

$ ln -s broken link
$ ls -l link
lrwxrwxrwx 1 cmaglie cmaglie 6 ott 29 12:18 link -> broken
$ git add link
$ git commit -m "Added broken link"

and rerun the CI.

Expected behavior

A successful build.

Regression

The error has already been reported and fixed in the past: https://github.com/codecov/codecov-action/issues/1433

Product Area

Code coverage in CI.

Versions

• CI/CD: GitHub Actions
• Uploader: codecov-action@v5

Commit and CI link

You can see it here until it lasts: https://github.com/arduino/arduino-cli/actions/runs/18904016674/job/53963368281?pr=3019#step:8:364

Start in codecov_cli/services/upload/upload_collector.py, especially _produce_file_fixes and _get_file_fixes, using the traceback to follow file handling. Reproduce the failure with a broken symlink in a Git repository and verify that coverage upload completes successfully without failing on the missing target.