Added a new stub for attempting to delete a missing asset #489

Job	Run time
test_matrix (3.1)	27s
test_matrix (3.2)	24s
test_matrix (3.3)	30s
CodeQL SAST scan / Analyze	49s
Dependency Review scan / dependency-review-pr	6s
Dependency Review scan / dependency-review-push	0s
SNYK security analysis / sast	29s
SNYK security analysis / sca	0s
test	1s
generate_pacts	16s
asset_manager_pact / Verify pact tests	58s
account_api_pact / Verify pact tests	55s
collections_pact / Verify pact tests	1m 30s
email_alert_api_pact / Verify pact tests	1m 1s
frontend_pact / Verify pact tests	26s
imminence_pact / Verify pact tests	1m 7s
link_checker_api_pact / Verify pact tests	45s
locations_api_pact / Verify pact tests	42s
publishing_api_pact / Verify pact tests	2m 18s
publish_pacts	0s
publish_gem	0s
	12m 44s

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