Disabling scan result policy does not refresh MR approval rules
### Summary
Disabled a scan result policy that is the only policy for a project/group, the MRs that already have the approval rules applied, were not refreshed.
### Steps to reproduce
- Create only 1 scan result policy for a project
- Create MR that violates the policy and check if approval is required
- Disable the policy
- Verify in MR that the approval is not removed
### Example Project
https://gitlab.com/gitlab-org/govern/security-policies/sashis-test-group/perf-test/-/merge_requests/3
### What is the current *bug* behavior?
MR approvals are not refreshed after the policy is disabled
#### Policy

#### MR

### What is the expected *correct* behavior?
MR approvals should be refreshed after the policy is disabled
### Relevant logs and/or screenshots
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### Output of checks
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#### Results of GitLab environment info
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<details>
<summary>Expand for output related to GitLab environment info</summary>
<pre>
(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)
(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)
</pre>
</details>
#### Results of GitLab application Check
<!-- Input any relevant GitLab application check information if needed. -->
<details>
<summary>Expand for output related to the GitLab application check</summary>
<pre>
(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:check SANITIZE=true`)
(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true`)
(we will only investigate if the tests are passing)
</pre>
</details>
### Possible fixes
- [ ] ~backend Update `Security::ProcessScanResultPolicyWorker` to remove the early return if `active_scan_result_policies` are empty
```diff
diff --git a/ee/app/workers/security/process_scan_result_policy_worker.rb b/ee/app/workers/security/process_scan_result_policy_worker.rb
index 1a54935a3add..46e1e428deb2 100644
--- a/ee/app/workers/security/process_scan_result_policy_worker.rb
+++ b/ee/app/workers/security/process_scan_result_policy_worker.rb
@@ -17,7 +17,6 @@ def perform(project_id, configuration_id)
return unless project && configuration
active_scan_result_policies = configuration.active_scan_result_policies
- return if active_scan_result_policies.empty?
sync_policies(project, configuration, active_scan_result_policies)
```
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issue