chore(migration): refactor hardcoded repo and images (#2172, #2181)

[zdrapela]

Description

Refactor repo name and image.

• Repository: janus-idp/backstage-showcase => redhat-developer/rhdh
• Quay.io:janus-idp/backstage-showcase => rhdh-community/rhdh

This fixes this error caused by having hardcoded variables and the repo migration:

cp: cannot stat '/tmp/backstage-showcase/e2e-tests/test-results/*': No such file or directory

Should fix also:

Timed out waiting for Docker image redhat-developer/rhdh:pr-2179-3b39bd3a. Time elapsed: 50 minute(s).

Which issue(s) does this PR fix

• Fixes RHIDP-5497, RHIDP-5555

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Unit Tests are updated and passing
• E2E Tests are updated and passing
• Documentation is updated if necessary (requirement for new features)
• Add a screenshot if the change is UX/UI related

How to test changes / Special notes to the reviewer

[josephca]

/lgtm
/approve

[nickboldt]

Latest images are at https://quay.io/repository/rhdh-community/rhdh?tab=tags&tag=latest instead of in the janus-idp/backstage-showcase quay location. Please update accordingly.

[nickboldt]

re: the failure of the PR Build Image test

Run docker/login-action@v3
Error: Username required

This is hopefully caused by the migration from janus-idp to redhat-developer in RHIDP-1022. I'll look into why this works in main but not in release-1.4 today.

[github-actions]

The image is available at:

• quay.io/rhdh-community/rhdh:pr-2174 or
• quay.io/rhdh-community/rhdh:pr-2174-f6b76aba

[nickboldt]

looks good but with one minor change to the quay image reference as we don't publish a :latest tag.

[github-actions]

The image is available at:

• quay.io/rhdh-community/rhdh:pr-2174 or
• quay.io/rhdh-community/rhdh:pr-2174-97e45c4f

[zdrapela]

/test e2e-tests

[gustavolira]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gustavolira, josephca, nickboldt

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Needs approval from an approver in each of these files:

• .ibm/OWNERS [gustavolira,josephca,nickboldt]
• e2e-tests/OWNERS [gustavolira,josephca,nickboldt]

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