Downstream memory optimization

[anandrkskd]

What type of PR is this?
/kind enhancement

What does this PR do / why we need it:
This PR adds the momory optimization changes (from PR) used on upstream argocd-operator to reduce the memory usage by caching only necessary config-maps and secret.

Have you updated the necessary documentation?

• Documentation update is required by this PR.
• Documentation has been updated.

Which issue(s) this PR fixes:

Fixes #?

Test acceptance criteria:

• Unit Test
• E2E Test

How to test changes / Special notes to the reviewer:

[openshift-ci]

Skipping CI for Draft Pull Request.
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[openshift-ci]

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[openshift-merge-robot]

PR needs rebase.

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