Update pinned message actions

[ganfra]

Content

This PR handles 2 things :

• Removes the redact action from the pinned message list context menu.
• Allow to unpin redacted events so you are not stuck with useless pinned events.

Motivation and context

https://github.com/element-hq/element-internal/issues/621

Screenshots / GIFs

Tests

• Step 1
• Step 2
• Step ...

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes have been tested on an Android device or Android emulator with API 23
• 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
• Pull request includes a sign off
• You've made a self review of your PR

[github-actions]

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[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 82.63%. Comparing base (7238af7) to head (f6c6943).
Report is 16 commits behind head on develop.

Files with missing lines	Patch %	Lines
...es/messages/impl/actionlist/ActionListPresenter.kt	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3438      +/-   ##
===========================================
- Coverage    82.63%   82.63%   -0.01%     
===========================================
  Files         1702     1702              
  Lines        40055    40050       -5     
  Branches      4872     4870       -2     
===========================================
- Hits         33100    33095       -5     
+ Misses        5234     5233       -1     
- Partials      1721     1722       +1     

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[bmarty]

LGTM, thanks!

[sonarcloud]

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 SonarCloud