Support verifying common images across namespaces

[binbin-li]

What would you like to be added?

Some images in a certain namespace might not be deployed by the namespace admin. Like the sidecar container is not controlled by the namespace admin. We would need to investigate and support those images common across namespaces in multi-tenancy scenario.

Anything else you would like to add?

No response

Are you willing to submit PRs to contribute to this feature?

• Yes, I am willing to implement it.

[susanshi]

Low priority for ratify 1.3