add unit tests to cover link processing for manila #8401

Job	Run time
Unit Tests	47s
Build (vagovdev)	7m 52s
Build (vagovstaging)	7m 52s
Drupal Cache Test	4m 52s
Build (vagovprod)	7m 52s
Run Jenkins CI	36s
Linting	1m 40s
login-to-amazon-ecr	6s
Validate App Registry	27s
Security Audit	29s
Cypress E2E Tests	1s
Testing Reports	1s
Get Latest Workflow Run Number	1s
Deploy	1s
Notify Failure	1s
	32m 38s

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