Use IO dispatcher for cleanup in bug reporter

[jmartinesp]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

Run the cleanup after sending a bug report in the IO dispatcher.

Motivation and context

Fixes #3086 (I hope).

Tests

I couldn't reproduce this even with strict mode enabled, but the instruction should be:

• In the OS developer options enable strict mode.
• Send a test bug report.
• If it doesn't crash after sending, it's fixed.

Tested devices

• Physical
• Emulator
• OS version(s): 14

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 includes a new file under ./changelog.d. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#changelog
• 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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[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

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 75.98%. Comparing base (ec06ce4) to head (d469cb6).
Report is 7 commits behind head on develop.

Files	Patch %	Lines
...ures/rageshake/impl/reporter/DefaultBugReporter.kt	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3092   +/-   ##
========================================
  Coverage    75.98%   75.98%           
========================================
  Files         1634     1634           
  Lines        38596    38597    +1     
  Branches      7461     7461           
========================================
+ Hits         29326    29328    +2     
  Misses        5380     5380           
+ Partials      3890     3889    -1     

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