FE: Add license type filtering

Why are we doing this work

• customers want to be able to choose the license type of license scans they get notified for

Relevant links

• 

Implementation plan

MR 1

• frontend create license type filter from the generic filter
  • title: License type:
  • description: Move the two existing dropdowns from the license_scan_rule_builder.vue
• frontend it is conditionally shown
  • hidden before the scanner is chosen
  • when Security Scan is chosen, it is hidden
  • when License Scan is chosen, it shows below the main section
• frontend ensure the description is set to the correct values when the values are changed in yaml mode
• frontend ensure rule mode is disabled if incorrect values are added in yaml mode
• frontend ensure the description is set to the correct values for pre-existing policies

Verification steps

1. Ensure the GitLab Ultimate license is enabled
2. Navigate to a project/group => Security & Compliance => Policies => New policy => Scan result policy
3. Verify the filter is hidden
4. Choose License Scan
5. Verify the filter is hidden
6. Choose Security Scan
7. Verify the filter can be changed and the yaml is updated appropriately
8. Navigate to yaml mode, make changes to values to a value that does exist, navigate to rule mode and ensure the description has been updated
9. Navigate to yaml mode, make changes to the values to a value that does not exist, navigate to rule mode and ensure that rule mode is disabled
10. Create the policy, edit it, verify the description is assigned the appropriate values