☂️ Replace etcd-custom-image with etcd-wrapper

[unmarshall]

How to categorize this issue?

/kind enhancement

What would you like to be added

etcd-custom-image is going to be removed. See Issue and the respective PR.

• Change image vector override for druid
• Change the command and args that are now passed to the new etcd-wrapper image (component-statefulset)
• Change everywhere eu.gcr.io/gardener-project/gardener/etcd is being referenced
  • test/utils/etcd.go
  • api/v1alpha1/types_etcd_test.go
  • component/etcd/statefulset/statefulset_test.go

Motivation (Why is this needed?)

See the reasons captured in Issue

Acceptance Criteria

Run e2e tests and g/g tests with etcd-wrapper instead of etcd-custom-image and all tests should pass.

[ishan16696]

I would like to add/suggest one more thing as acceptance criteria:
We should be able to mimic every possible condition/scenario via ephemeral containers for debugging purposes of etcd cluster as one of such requirement I mentioned here gardener/etcd-wrapper#3 (comment)

[shreyas-s-rao]

Change README to reflect the image change

@unmarshall etcd-druid does not mention etcd-custom-image anywhere in the repo, except in the charts/images.yaml file, which will anyway be replaced by etcd-wrapper. I think adding this change to the README should be part of an overall overhaul of the druid docs, and should not be a subtask for this umbrella issue. WDYT?

[unmarshall]

I think adding this change to the README should be part of an overall overhaul of the druid docs, and should not be a subtask for this umbrella issue. WDYT?

Ok that is fine. We do not have to do this now. I think you have another issue for overhauling the doc for druid. Can you add this point as one of the things to be done in that task?