Remove automatic Z stream version bumping in release branch

[dkwon17]

What does this PR do?

Fixes issue where whenever we did the DWO upstream release, there would be an unnecessary "chore: release: bump ..." (example) commit that would bump the deployment manifest image tags to use a bumped Z-stream, which is a non-existing image.

In the example provided above, v0.39.0 tags are being bumped to v0.39.1, even though v0.39.1 does not exist (v0.39.0 exists).

It's why I've needed to create a new commit to revert the change for the manifests to be usable: 43400de

What issues does this PR fix or reference?

n/a

Is it tested? How?

This change is not straight forward to test unfortunately. However, the change should be safe because we are simply preventing an image tag to be updated to a tag that does not exist.

PR Checklist

• E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • v8-che-happy-path: Happy path for verification integration with Che

[openshift-ci]

@dkwon17: 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/v14-che-happy-path	0fe5c6e	link	true	/test v14-che-happy-path

Full PR test history. Your PR dashboard.

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dkwon17, rohanKanojia

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