Update scan result drawer to not require actions

What does this MR do and why?

Update scan result drawer to not require actions

• make actions not required
• add conditionals for action yaml
• show updated text if no approvals are required
• update tests

Changelog: changed

EE: true

Screenshots or screen recordings

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

Scenario	Before	After
Has approvers		No change
No change	blank

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Upload a GitLab Ultimate license
2. Navigate to a project/group => Secure => Policies => New policy => Scan Result Policy => Yaml mode => Insert the below yaml => Create policy

type: scan_result_policy
name: Settings only / No Actions
description: ''
enabled: false
rules:
  - type: license_finding
    branches: []
    match_on_inclusion: true
    license_types:
      - Abstyles License
    license_states:
      - newly_detected
      - detected
approval_settings:
  block_protected_branch_modification:
    enabled: true

3. Navigate to the project/group => Secure => Policies => Select new policy
4. Verify that policy drawer is not blank

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 #421920 (closed)