remove rotation of keys endpoint from ux-backend

[leelavg]

existing mechanism is only working as a proxy for deletion of secret w/ no added value, so deleting this endpoint and UI will be wired to directly perform the operator.

ref: #2469

[nb-ohad]

/lgtm

[nb-ohad]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

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[leelavg]

/override ci/prow/ocs-operator-bundle-e2e-aws

[1782237453432655872](https://prow.ci.openshift.org/view/gs/test-platform-results/pr-logs/pull/red-hat-storage_ocs-operator/2569/pull-ci-red-hat-storage-ocs-operator-main-ocs-operator-bundle-e2e-aws/1782237453432655872)	#[2569](https://github.com/red-hat-storage/ocs-operator/pull/2569)
([a209a03](https://github.com/red-hat-storage/ocs-operator/pull/2569/commits/a209a0351ce77fe9aaafede17706752a44869e82)) by [leelavg](https://github.com/leelavg)	
08:08:21
1h33m37s	SUCCESS

[openshift-ci]

@leelavg: leelavg unauthorized: /override is restricted to Repo administrators, approvers in top level OWNERS file, and the following github teams:.

In response to this:

/override ci/prow/ocs-operator-bundle-e2e-aws

[1782237453432655872](https://prow.ci.openshift.org/view/gs/test-platform-results/pr-logs/pull/red-hat-storage_ocs-operator/2569/pull-ci-red-hat-storage-ocs-operator-main-ocs-operator-bundle-e2e-aws/1782237453432655872)	#[2569](https://github.com/red-hat-storage/ocs-operator/pull/2569)
([a209a03](https://github.com/red-hat-storage/ocs-operator/pull/2569/commits/a209a0351ce77fe9aaafede17706752a44869e82)) by [leelavg](https://github.com/leelavg)	
08:08:21
1h33m37s	SUCCESS

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[iamniting]

/override ci/prow/ocs-operator-bundle-e2e-aws

[openshift-ci]

@iamniting: Overrode contexts on behalf of iamniting: ci/prow/ocs-operator-bundle-e2e-aws

In response to this:

/override ci/prow/ocs-operator-bundle-e2e-aws

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