GTest leaves some temporary files which are not .gitignored

[nobruinfo]

Test Environment (required)

• Tools Platform: Windows wsl
• Tools Version: 20241109.10-22mega-163e656
• MEGA65 Platform: all
• ROM Release: irrelevant
• Core Commit: irrelevant

Describe the bug

After each run of make test a bunch of file remain in the main project's folder. Some of them are not listed in .gitignore.

To Reproduce

Steps to reproduce the behavior:

1. Check out project
2. make test
3. git diff
4. See dummy.txt has changed and will be considered in all the diffs of a pull request.

Expected behavior

Either change all of the test steps to clean after themselves or put all of the files into .gitignore.

Screenshots

N/A.

Additional context

A pure nice to have.