ROX-19330: Add second declarative config mount point to central CR

[ivan-degtiarenko]

Description

This PR adds a second declarative config mount point to ACSCS centrals.

The secret referenced here will not be created by reconciler, but rather manually and only when customer requests multiple orgs support. In that case cloud-service-manual-declarative-configs secret will be created and populated with the corresponding auth provider configuration.

The reasons to introduce separate secret here:

• Want to separate ownership - cloud-service-sensible-declarative-configs contents are controlled only by fleetshard-sync, let's keep it that way
• It's easier to identify if declarative configuration was manually changed if secret is separate

Ideally, I would like to name secrets cloud-service-reconciled-declarative-configs and cloud-service-manual-declarative-configs, however, migrating existing secret names looks like a non-trivial task not worth pursuing.

Checklist (Definition of Done)

• Unit and integration tests added
• Added test description under Test manual
• Documentation added if necessary (i.e. changes to dev setup, test execution, ...)
• CI and all relevant tests are passing
• Add the ticket number to the PR title if available, i.e. ROX-12345: ...
• Discussed security and business related topics privately. Will move any security and business related topics that arise to private communication channel.
• Add secret to app-interface Vault or Secrets Manager if necessary
• RDS changes were e2e tested manually
• Check AWS limits are reasonable for changes provisioning new resources

Test manual

1. CI is sufficient

[parametalol]

LGTM, provided with explanation that the automated tests cover the usecase.

Under condition that the CI tests pass.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 0x656b694d, ivan-degtiarenko

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[ivan-degtiarenko]

/retest