Publish stable releases to the stable OLM channel

[tiraboschi]

What this PR does / why we need it:
Fix the release automation to always publish
stable releases to the stable OLM channel.

Fixes: #2954

Reviewer Checklist

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• PR Message
• Commit Messages
• How to test
• Unit Tests
• Functional Tests
• User Documentation
• Developer Documentation
• Upgrade Scenario
• Uninstallation Scenario
• Backward Compatibility
• Troubleshooting Friendly

Jira Ticket:

NONE

Release note:

Publish stable releases to stable OLM channel again

[coveralls]

Pull Request Test Coverage Report for Build 9661237929

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 85.839%

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Totals
Change from base Build 9658355966:	0.0%
Covered Lines:	5219
Relevant Lines:	6080

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💛 - Coveralls

[nunnatsa]

/approve

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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