Resolve "Run UserRefreshFromReplicaWorker on the replica database"

What does this MR do?

The AuthorizedProjectUpdate::UserRefreshFromReplicaWorker runs project authorization refresh jobs for users. This class is specifically used as a safety-net along with newer project authorization approaches using specialized workers. An example is here.

The only place AuthorizedProjectUpdate::UserRefreshFromReplicaWorker is enqueued from is here

Since this worker runs always as a "safety-net" and with a 1 hour delay, it is a good candidate to be run on the replica database (as its class name rightly suggests 😄) and this MR is aimed at making this worker read the data from the replica database.

Internally, after this change, this worker:

• will read the data of a user's project authorizations from the replica database.
• Using AuthorizedProjectUpdate::FindRecordsDueForRefreshService.new(user).needs_refresh?, it will check in the replica database whether the user needs a project authorizations refresh.
• If it does, it enqueues a new job using AuthorizedProjectUpdate::UserRefreshWithLowUrgencyWorker.perform_async(user.id) for this particular user (which would eventually read the data from the primary)

This is the same pattern we use in periodic project authorization jobs and it has been working well for us.

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

• I have included changelog trailers, or none are needed. (Does this MR need a changelog?)
• I have added/updated documentation, or it's not needed. (Is documentation required?)
• I have properly separated EE content from FOSS, or this MR is FOSS only. (Where should EE code go?)
• I have added information for database reviewers in the MR description, or it's not needed. (Does this MR have database related changes?)
• I have self-reviewed this MR per code review guidelines.
• This MR does not harm performance, or I have asked a reviewer to help assess the performance impact. (Merge request performance guidelines)
• I have followed the style guides.
• This change is backwards compatible across updates, or this does not apply.

Availability and Testing

• I have added/updated tests following the Testing Guide, or it's not needed. (Consider all test levels. See the Test Planning Process.)
• I have tested this MR in all supported browsers, or it's not needed.
• I have informed the Infrastructure department of a default or new setting change per definition of done, or it's not needed.

Security

Does this MR contain changes to processing or storing of credentials or tokens, authorization and authentication methods or other items described in the security review guidelines? If not, then delete this Security section.

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team

Related to #333219 (closed)