chore: Limit new all-namespaces-stable channel to OpenShift 4.8+

[tolusha]

Signed-off-by: Anatolii Bazko abazko@redhat.com

What does this PR do?

Limit new all-namespaces-stable channel to OpenShift 4.8+
see docs:
https://redhat-connect.gitbook.io/certified-operator-guide/ocp-deployment/operator-metadata/bundle-directory/managing-openshift-versions

Screenshot/screencast of this PR

N/A

What issues does this PR fix or reference?

eclipse-che/che#20234

How to test this PR?

N/A

PR Checklist

As the author of this Pull Request I made sure that:

• The Eclipse Contributor Agreement is valid
• Code produced is complete
• Code builds without errors
• Tests are covering the bugfix
• Custom resource definition file is up to date
• OLM bundles are up to date
• The repository devfile is up to date and works
• Sections What issues does this PR fix or reference and How to test this PR completed
• Relevant user documentation updated
• Relevant contributing documentation updated
• CI/CD changes implemented, documented and communicated

Reviewers

Reviewers, please comment how you tested the PR when approving it.

[openshift-ci]

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

Test name	Commit	Details	Rerun command
ci/prow/v7-stable-to-nightly	cb3bde1	link	/test v7-stable-to-nightly

Full PR test history. Your PR dashboard.

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: AndrienkoAleksandr, mmorhun, tolusha

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[nickboldt]

Does this change actually work? Asking because https://issues.redhat.com/browse/CRW-2138 suggests to me that we can't set a version other than 4.5 (old format appstream) or 4.6 (new format iib bundle).

[tolusha]

@nickboldt
Maybe because of that

NOTE: Commas are generally not allowed, and should not be used. For historical reasons, there are two special values that are currently allowed, v4.5,v4.6 and v4.6,v4.5. Both behave as just v4.5. The operator is supported on the v4.5 version of OpenShift or later. Any other usage of commas, e.g. v4.6,v4.7, will prevent the operator from being added to the certified catalog.

[tolusha]

I don't see why v4.8 won't work.
But I will try to build a bundle and test.
Thank you for bringing this up.

[tolusha]

Doc [1] proves that LABEL com.redhat.openshift.versions="v4.8" works

[1] https://access.redhat.com/documentation/en-us/openshift_container_platform/4.8/html-single/operators/index
(4.8.5. Controlling Operator compatibility with OpenShift Container Platform versions)