Fix Ironbank Deployment Pipeline Error

[DMedina6]

Ironbank deployment pipeline gives an error during the lint-and-image-inspect job:

$ python3 "${PIPELINE_REPO_DIR}/stages/validate-container-repository/lint/validate_hardening_manifest.py"
| hardening_manifest           | INFO     | Validating schema
| hardening_manifest           | INFO     | This task will exit if not completed within 2 minutes
| hardening_manifest           | ERROR    | Hardening Manifest failed jsonschema validation
| hardening_manifest           | ERROR    | Verify Hardening Manifest content
| hardening_manifest           | ERROR    | {'tag': 'mitre/heimdall2:2.10.4', 'url': 'docker://docker.io/mitre/heimdall2@'} is not valid under any of the given schemas

which indicates that the url is missing the SHA commit hash at the end. Code has been adjusted to correctlyed grab this value and has been tested.

[sonarcloud]

Quality Gate passed

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