chore: Update oauth-proxy and kube-rbac-proxy gateway images

[dkwon17]

What does this PR do?

Updates the oauth-proxy and kube-rbac-proxy gateway images from the che-gateway pod.

I based this update on a previous update done here: 7d6dcbd

Screenshot/screencast of this PR

What issues does this PR fix or reference?

PR made in response to eclipse-che/che#22353

How to test this PR?

1. Checkout this PR branch, and run ./build/scripts/olm/test-catalog-from-sources.sh to install Eclipse Che on a cluster
2. Verify that the oauth-proxy and kube-rbac-proxy images are quay.io/openshift/origin-oauth-proxy:4.15 and quay.io/openshift/origin-kube-rbac-proxy:4.15 respectively :

$ oc get deployment che-gateway -n eclipse-che  -o jsonpath='{.spec.template.spec.containers[*].image}'

<traefik-image> <configbump-image> quay.io/openshift/origin-oauth-proxy:4.15 quay.io/openshift/origin-kube-rbac-proxy:4.15

3. Verify that you can visit the Che dashboard and start a workspace without any errors.

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
• Development resource 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]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: dkwon17

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[dkwon17]

I unfortunately still experience 401/403 errors even with the updated gateway images:

[dkwon17]

Needs further testing, I received websocket connection error from the dashboard the last time I tested the new images

[openshift-merge-robot]

PR needs rebase.

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[openshift-ci]

@dkwon17: The following tests 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-devworkspace-happy-path	3c2fda1	link	true	/test v14-devworkspace-happy-path
ci/prow/v14-operator-test	3c2fda1	link	true	/test v14-operator-test
ci/prow/v14-upgrade-stable-to-next	3c2fda1	link	true	/test v14-upgrade-stable-to-next
ci/prow/v14-che-behind-proxy	3c2fda1	link	true	/test v14-che-behind-proxy

Full PR test history. Your PR dashboard.

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[dkwon17]

Closing since this PR is not absolutely necessary for now