Humanised strings for branch exceptions for scan result policy

What does this MR do and why?

This MR partially resolves #418744 (closed)

Policy drawer has humanised strings for branch exceptions in security result policy

UI mode is only supported for project level, for group level exceptions can be added via yaml mode

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

VERSION 1

Project Level	Group Level

VERSION 2

Project Level	Group Level
project_level.mov	group_level.mov

How to set up and validate locally

Enable feature flag

Feature.enable(:security_policies_branch_exceptions)

1. Go to a project

2. Open Secure -> Policies

3. Create new scan result policy

4. Add security scan rule or license scan rule

5. Add some branch exceptions (if local project has no branches, you can add some)

6. Create policy and go back to policy list Secure -> Policies

7. Click on created policy -> result for project level will be in drawer description

8. Go to a group

9. Open Secure -> Policies

10. Create new scan result policy

11. Open yaml mode, you can add branch exceptions for a rule

    branch_exceptions:
      - { name: ${BRANCH_NAME}, full_path: ${PATH_TO_PROJECT} }
      - { name: ${BRANCH_NAME_2 }, full_path: ${PATH_TO_PROJECT } }

12. Create policy and go back to policy list Secure -> Policies

13. Make sure that there is path in brackets right next to a branch name

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #418744 (closed)