[GHA] Print also images digests after the image build in GitHub repo

[jstourac]

Description

How Has This Been Tested?

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[jiridanek]

/lgtm

[caponetto]

/lgtm

[jstourac]

Thank you, guys!

/approved

[caponetto]

/override ci/prow/rocm-notebooks-e2e-tests
/override ci/prow/images

[openshift-ci]

@caponetto: Overrode contexts on behalf of caponetto: ci/prow/images, ci/prow/rocm-notebooks-e2e-tests

In response to this:

/override ci/prow/rocm-notebooks-e2e-tests
/override ci/prow/images

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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