Fix adding a container registry flow

[olexii4]

Signed-off-by: Oleksii Orel oorel@redhat.com

What does this PR do?

Fix adding a container registry from Dashboard/User Preferences.

What issues does this PR fix or reference?

fixes eclipse-che/che#21589

[che-bot]

Click here to review and test in web IDE:

[github-actions]

Docker image build succeeded: quay.io/eclipse/che-dashboard:pr-610

[openshift-ci]

@olexii4: 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/v8-dashboard-happy-path	0ea48b2	link	true	/test v8-dashboard-happy-path

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: akurinnoy, ibuziuk, olexii4

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