fix(RHIDP-8971): migrate tests to use extensions catalog entities from overlay repo

[sanketpathak]

Description

https://issues.redhat.com/browse/RHIDP-8971

Please explain the changes you made here.

Which issue(s) does this PR fix

• Fixes #?

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How to test changes / Special notes to the reviewer

[sanketpathak]

/retest

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[gustavolira]

/test e2e-ocp-helm

[openshift-ci]

@sanketpathak: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-ocp-helm	2684ad7	link	true	/test e2e-ocp-helm

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[nickboldt]

this is a scratch image, so you can't just reference it this way

[nickboldt]

because quay.io/rhdh/plugin-catalog-index are scratch images (with no OS) you can't just pull the image and mount it to get file paths. You have to extract the contents.

See https://gist.github.com/nickboldt/86f78312234d84490f1186b389235a29#file-unpack-oci-sh-L5-L7 for how to fetch, unpack, and access the files you want

[nickboldt]

I mentioned this in the related JIRA some weeks ago https://issues.redhat.com/browse/RHIDP-8971?focusedId=28473233&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-28473233

[nickboldt]

The approach here is wrong.

We do NOT want to continue to embed the catalog entities in the RHDH image. That was why we moved them into a separate container image.

The ask in https://issues.redhat.com/browse/RHIDP-8971 was to have the tests use the NEW location of the catalog index image, not to re-embed the contents back into the RHDH image.

See also https://issues.redhat.com/browse/RHIDP-9764 and https://issues.redhat.com/browse/RHIDP-9762 where we're adding the ability for the helm and operator to deploy the index image at install time.