feat(redis): Inject creds via volume (WIP)

[olivergondza]

What type of PR is this?

Uncomment only one /kind line, and delete the rest.
For example, > /kind bug would simply become: /kind bug

/kind bug
/kind cleanup
/kind failing-test
/kind enhancement
/kind documentation
/kind code-refactoring

What does this PR do / why we need it:

Avoid passing the password over environment variables and command line arguments. Downstream of:

• feat(redis): Inject creds via volume argoproj-labs/argocd-operator#2059
• feat(redis): Inject creds to agent via volume argoproj-labs/argocd-operator#2113

Have you updated the necessary documentation?

• [no] Documentation update is required by this PR.
• [no] 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:

Blocked until the upstream PRs are merged.

[openshift-ci]

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[openshift-ci]

@olivergondza: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/v4.19-ci-index-gitops-operator-bundle	687fabb	link	true	/test v4.19-ci-index-gitops-operator-bundle
ci/prow/v4.19-kuttl-sequential	687fabb	link	true	/test v4.19-kuttl-sequential
ci/prow/v4.14-kuttl-sequential	687fabb	link	false	/test v4.14-kuttl-sequential
ci/prow/v4.14-e2e	687fabb	link	true	/test v4.14-e2e
ci/prow/v4.19-images	687fabb	link	true	/test v4.19-images
ci/prow/v4.19-e2e	687fabb	link	true	/test v4.19-e2e
ci/prow/v4.14-images	687fabb	link	true	/test v4.14-images
ci/prow/v4.14-kuttl-parallel	687fabb	link	false	/test v4.14-kuttl-parallel
ci/prow/v4.19-kuttl-parallel	687fabb	link	true	/test v4.19-kuttl-parallel
ci/prow/v4.14-ci-index-gitops-operator-bundle	687fabb	link	true	/test v4.14-ci-index-gitops-operator-bundle
ci/prow/unit	687fabb	link	true	/test unit

Full PR test history. Your PR dashboard.

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