"tests/e2e/run-local" ignores cleanup failures

[ldoktor]

Describe the bug
Looking at https://github.com/confidential-containers/operator/actions/runs/10990240519/job/30510052789?pr=439 it looks like the status is not reported correctly at least when post-test check fails (in this case there were some pods still running after uninstalling the operator which is reported as Error in the Run e2e tests step but the CI reported PASS.

To Reproduce
Steps to reproduce the behavior:

1. Run the tests/e2e/run-local.sh and fail in undo_changes

Describe the results you expected
IMO it should proceed with the cleanup and raise an error (not failure) with a different error afterwards.

Describe the results you received:
No report of unusual situation, green CI.