fix: replace kube-rbac-proxy image tag v0.8.0 with its digest equivalent (#510)

[mortya]

What type of PR is this?

/kind bug

What does this PR do / why we need it:

This PR fixes installation in environments that require images to be mirrored by digest rather than tag, such as openshift in a "restricted" network install.

Note that this PR includes modifying older CSV versions. I'm not sure that's kosher. If not, please free to leave out that part, or kick it back to me for fixing.

Have you updated the necessary documentation?

N/A

Which issue(s) this PR fixes:

Fixes #510

How to test changes / Special notes to the reviewer:

Issue #510 includes a description of how to test that the actual problem is fixed.

That said, it's a lot of work. It should also be possible to upgrade an existing installation, and just look at the output of

ns=argocd; # or whatever
kubectl -n $ns get po -l control-plane=controller-manager;
kubectl -n $ns get po -l control-plane=controller-manager -o json | jq '.items[].spec.containers[0].image' -r

If the pod is running and has a kube-rbac-proxy image specified by digest instead of tag, you know it's working.

[jaideepr97]

Hi @mortya thanks for your PR!

I think it would be best to leave this change out of the released version bundles
would you mind restricting this to master and the 0.7.0 bundle?

[mortya]

Hi, @jaideepr97 ! I do not at all mind modifying the PR to only apply to new cluster service versions. Done. Not sure what the fashion is here for correcting PRs; did it as an amend and a force push rather than a new commit. Hope that's OK!

[jaideepr97]

Great, thanks @mortya !
LGTM