ROX-21946: FS set central-tls OwnerReference if not already set

[johannes94]

Description

After restore of central-tls secret the owner reference is not set to the central CR again. This blocks the operator from automatically rotating leaf certificates for central, since it won't touch secrets not owned by it.

With this PR fleetshard-sync, will set the owner reference of the secret to the CR it creates, which should fix the issue.

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

CI and added e2e tests should be sufficient

# To run tests locally run:
make db/teardown db/setup db/migrate
make ocm/setup
make verify lint binary test test/integration

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: johannes94, stehessel

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