Draft: Update query tokens for policy violation filtering

What does this MR do and why?

Update query tokens for policy violation filtering

• backend MR to add the filter capability: Filter vulnerabilities dismissed by security po... (!202622)
• initial frontend MR to add the filter: Conditionally show policy violation vuln filter (!206461 - merged)
• include dashboard type in filter function
• create policyViolation variable

Changelog: added

EE: true

References

Screenshots or screen recordings

Scenario	Screenshot
Without feature flag
Without elastic search
With elastic search

How to set up and validate locally

How to set up and validate locally

Elasticsearch Setup

1. Enable the Elasticsearch in GDK

gdk config set elasticsearch.enabled true
gdk reconfigure
gdk start elasticsearch

Simulate SAAS mode

1. add export GITLAB_SIMULATE_SAAS=1 to env.runit
2. Restart the gdk

gdk kill && gdk start

Dismiss a security finding blocked by a security policy

1. Enable the advanced_vulnerability_management and security_policy_approval_warn_mode feature flags in http://gdk.test:3000/rails/features
2. Import the security-reports project.
3. Run a new pipeline on the default branch to create vulnerabilities
4. Go to Secure > Policies and create a Merge Request Approval policy
5. Create an MR editing the README file
6. Create a record of Security::PolicyDismissal to simulate a bypassed/dismissed policy

Security::PolicyDismissal.create(project: Project.second_to_last, merge_request: MergeRequest.last, security_policy: Security::Policy.last, user: User.first, dismissal_reason: 0, security_findings_uuids: ["84c1832e-294d-59f0-b3ff-b4414cc86c70"])

7. Checkout Filter vulnerabilities dismissed by security po... (!202622)
8. Cherry pick this MR onto that
9. Navigate to a project/group => Secure => Vulnerability Report => Filter by "Dismissed in MR"
10. Verify only the new vulnerabilities appear

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #549786