Setting non-default image breaks deployment due to release tag mis-match.

[vennemp]

If you set the image repository to something that is non-default, the helm chart may not update due to a tag mis-match.

  Warning  Failed     2m19s (x4 over 3m50s)  kubelet            Failed to pull image "openpolicyagent/gatekeeper-crds:latest": rpc error: code = NotFound desc = failed to pull and unpack image "docker.io/openpolicyagent/gatekeeper-crds:latest": failed to resolve reference "docker.io/openpolicyagent/gatekeeper-crds:latest": docker.io/openpolicyagent/gatekeeper-crds:latest: not found
  Warning  Failed     2m19s (x4 over 3m50s)  kubelet            Error: ErrImagePull
  Warning  Failed     2m5s (x6 over 3m49s)   kubelet            Error: ImagePullBackOff
  Normal   BackOff    111s (x7 over 3m49s)   kubelet            Back-off pulling image "openpolicyagent/gatekeeper-crds:latest"

What did you expect to happen:
Add a separate value for the crdRepository release tag. So this can be decoupled.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.

[JaydipGabani]

@vennemp Are you interested in contributing this change, should be pretty strightforward?