chore: removes local cache used for rotation

[nilekhc]

Signed-off-by: Nilekh Chaudhari 1626598+nilekhc@users.noreply.github.com

What this PR does / why we need it:
This PR removes local informer cache used for rotation reconciler. Instead now it uses manager's cache.

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):
Fixes #582

Special notes for your reviewer:

[k8s-ci-robot]

Hi @nilekhc. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[nilekhc]

/cc @aramase @tam7t

[aramase]

/ok-to-test

[nilekhc]

/test pull-secrets-store-csi-driver-e2e-azure

[aramase]

/label tide/merge-method-squash

[aramase]

@nilekhc The changes look good! We should also run load tests with the similar cluster setup as https://secrets-store-csi-driver.sigs.k8s.io/load-tests.html to document the memory consumption.

[nilekhc]

Load test result for top 5 CSI driver pods (without pprof enabled):

NAME                      CPU(cores)   MEMORY(bytes)   
csi-secrets-store-p2f92   2m           55Mi            
csi-secrets-store-9z7nm   2m           55Mi            
csi-secrets-store-k57d4   1m           54Mi            
csi-secrets-store-hmqzs   2m           54Mi            
csi-secrets-store-4lp76   2m           54Mi            

Load test result for top 5 CSI driver pods (with pprof enabled):

NAME                      CPU(cores)   MEMORY(bytes)
csi-secrets-store-54sxr   2m           59Mi
csi-secrets-store-hhqc5   2m           59Mi
csi-secrets-store-kx77t   2m           59Mi
csi-secrets-store-994xs   2m           58Mi
csi-secrets-store-fm25p   2m           58Mi

[tam7t]

/lgtm

[aramase]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aramase, nilekhc

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