When a primary Package is checksummed, reset verification on secondaries

What does this MR do?

When a resource is checksummed on the primary, we need to re-verify on the secondary. By resetting the verification fields on secondaries, the verification jobs will notice these are pending verification, and will then verify them.

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry => behind feature flag
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.

Related to #13842 (closed)