Fix#3205 by removing stale sdstress work directories left by previous interrupted or failed runs before starting a new test.
The cleanup only removes entries matching the generated tmpNNN file pattern. If the directory contains any unexpected entry, the test fails instead of deleting user data.
Also make create_dir() and remove_dir() use their path argument instead of the fixed temporary directory names.
Signed-off-by: Nightt <87569709+nightt5879@users.noreply.github.com>
2d6cd74215