Fix : iterate on unban permissions

[ganfra]

Content

After more tests on our side (and digging with the backend team), we need both kick and ban permissions to unban someone.
Also we reverted the logic for displaying banned users to having the ban permission.

Motivation and context

Better ux.

Screenshots / GIFs

No ui change.

Tests

• Tweaks the PowerLevel so you have the PL for ban but not kick
• Long click on a member in the member list
• Check you can only ban the member
• Go to the banned tabs, and check you cannot unban him.

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes have been tested on an Android device or Android emulator with API 24
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request title will be used in the release note, it clearly define what will change for the user
• Pull request includes screenshots or videos if containing UI changes
• You've made a self review of your PR

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud