Update tooling for OCP 4.15; update base images

[AObuchow]

This PR updates the tooling used in the web terminal operator tooling container to their latest versions available on mirror.openshift.com and github releases for OCP 4.15, as well as updates the UBI8-minimal image used.

Testing

I've pushed the web terminal tooling container built from this PR to quay.io/aobuchow/wto-tooling:1.10 for convenience.

1. Launch an OpenShift 4.15 cluster
2. Install the web-terminal operator
3. Create a web terminal and click the link to specify a custom image, and provide quay.io/aobuchow/wto-tooling:1.10. Alternatively, create a web terminal with the default image and run wtoctl set image quay.io/aobuchow/wto-tooling:1.10 in the web terminal console
4. Verify the web terminal starts up successfully. The provided binaries should be updated to the versions specified in this PR. For example, running oc version should indicate version 4.15.

[AObuchow]

I had some doubts w.r.t the version of kustomize that should be included in this PR, as the kustomize CLI binary is not included downstream (neither is rhoas).

Downstream, we only ship kustomize as a kubectl plugin (i.e. kubectl kustomize ...). The version of kustomize can be checked with kubectl version. With oc 4.15 & kubectl v.1.28.2, the version of kubectl kustomize included is v5.0.4-0.20230601165947-6ce0bf390ce3. However, WTO 1.9 upstream was already shipping v5.2.1 of the kustomize binary.

Thus, I'm under the impression the version of the kustomize binary we ship upstream is not dependant on the version of kubectl kustomize that we ship downstream.

[dkwon17]

Double checking, should kubevirt be updated as well? To kubevirt 1.2.0.

[AObuchow]

Good catch, seems like kubevirt was released as I was working on this PR

[AObuchow]

Just double checked: WTO downstream uses the cnv-4.14-for-rhel-8-x86_64-rpms repo for installing kubevirt (virtctl) and there doesn't seem to be a correspondance between the downstream version and upstream version: the version shipped in both upstream and dowstream are the latest available versions for each product.

For example, WTO 1.9 upstream uses kubevirt v1.10 and downstream uses v0.59.2-50-gfc77afd4e.

Will update this PR accordingly.

[dkwon17]

The output LGTM:

[AObuchow]

Thank you for the review David :) I pushed the fixup commits for updating kubevirt to v1.2.0

[dkwon17]

LGTM

[AObuchow]

Thank you so much for the review @dkwon17 :) Merging 🎉