FE: Update Scan Result Policy Rule UX

Why are we doing this work

• Users want the selection of existing policy rules to be more intuitive

Relevant links

Design

Implementation plan

• frontend update rules to match design
  • modify css in policy_rule_builder
  • ensure both security scan and license scan rules work on both project and group-level
  • do not add any additional criteria
  • do not modify Scan Execution Policies

Title	Issue	MR
Base component	Related issue	115732
Rearrange layout	Related issue	TBD
Add new empty state selector	Related issue	TBD
Adding filters	👈 This one	TBD
Migrate protected branches selector	Related issue	MR

Verification steps

1. Upload an GitLab Ultimate license
2. Navigate to a project/group => Security & Compliance => Policies => New Policy => Scan Result Policy
3. Verify new Rules