feat(conversation): add manual MLS migration (WPB-27446)

[MohamadJaara]

https://wearezeta.atlassian.net/browse/WPB-27446

Goal

Add a temporary manual path for testing Proteus/Mixed conversation migration to MLS during the transition phase.

Jira: WPB-27446

Changes

• reveal a confirmation dialog after five consecutive taps on the Protocol row
• allow the action only when MLS migration is enabled, the protocol is Proteus or Mixed, and the conversation team matches the self-user team
• keep the dialog open on outside taps and show migration loading, success, and failure states
• invoke the backend migration flow and include backend HTTP code and error label when available
• add concise lifecycle logs and focused unit coverage

[codecov]

Codecov Report

❌ Patch coverage is 72.28916% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 52.83%. Comparing base (977ecf5) to head (dc210c8).
⚠️ Report is 11 commits behind head on develop.

Files with missing lines	Patch %	Lines
...tions/details/GroupConversationDetailsViewModel.kt	71.79%	11 Missing and 11 partials ⚠️
...rc/main/kotlin/com/wire/android/model/Clickable.kt	0.00%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (72.28%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5168      +/-   ##
===========================================
+ Coverage    52.77%   52.83%   +0.06%     
===========================================
  Files          659      659              
  Lines        23589    23669      +80     
  Branches      3881     3904      +23     
===========================================
+ Hits         12448    12506      +58     
- Misses        9994    10005      +11     
- Partials      1147     1158      +11     

Files with missing lines	Coverage Δ
...ations/details/options/GroupConversationOptions.kt	0.00% <ø> (ø)
...s/details/options/GroupConversationOptionsState.kt	97.36% <100.00%> (+0.22%)	⬆️
...rc/main/kotlin/com/wire/android/model/Clickable.kt	0.00% <0.00%> (ø)
...tions/details/GroupConversationDetailsViewModel.kt	83.17% <71.79%> (-5.96%)	⬇️

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[github-actions]

Test Results

2 249 tests   2 249 ✅  1m 47s ⏱️
  245 suites      0 💤
  245 files        0 ❌

Results for commit dc210c8.