Resolve "Error handling on harden_manifest step"

Closes #163 (closed)

This MR creates a timeout for infinite looping pattern matching when validating a hardening_manifest.yaml file.

Relevant jobs:

• https://repo1.dso.mil/dsop/opensource/pipeline-test-project/ubi8-minimal/-/jobs/1556823 (changed signal to user defined)
• https://repo1.dso.mil/dsop/opensource/pipeline-test-project/ubi8-minimal/-/jobs/1531829
• https://repo1.dso.mil/dsop/opensource/pipeline-test-project/ubi8-minimal/-/jobs/1488842
• https://repo1.dso.mil/dsop/opensource/pipeline-test-project/ubi8-minimal/-/jobs/1488705