Resolve inventory validation errors in deploy-release stage

[leochr]

In deploy-release stage, messages similar to the following can be seen for operator, bundle, catalog images. This hasn't affected the CD/release. But we should investigate and resolve them. Changes to resolve this might require changes to the CD pipeline.

Build OLO CI 585:

Validation Unsuccessful
When validating entry : 'bundle-1.4.0', the following observations were made

Artifact field: Artifact field is missing the sha256 suffix
	Ensure the artifact follows the format <static_name>:<version>@sha256:<sha256_digest> OR <static_name>@sha256:<sha256_digest>
	Validation for artifact field will be successful if you provide the artifact field's value as cp.stg.icr.io/cp/open-liberty-operator-bundle:1.4.0@sha256:1eee24d0e5510194a5be1463164116520cbce81915462d418f35b32128b3a216. 
	
            Please add the sha256 field in the end of the artifact value as shown to have this field successfully validated.
	Ensure the artifact follows the format <static_name>:<version>@sha256:<sha256_digest> OR <static_name>@sha256:<sha256_digest>