chore: Remove call to deleteSubConversation after ending 1:1 call (WPB-11007)

[ohassine]

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PR Submission Checklist for internal contributors

• The PR Title

  • conforms to the style of semantic commits messages¹ supported in Wire's Github Workflow²
  • contains a reference JIRA issue number like SQPIT-764
  • answers the question: If merged, this PR will: ... ³

• The PR Description

  • is free of optional paragraphs and you have filled the relevant parts to the best of your ability

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What's new in this PR?

Description

We need to remove the call to DELETE /conversations/:domain/:uuid/subconversations/conference and revert the call to leaveMlsConference after ending a 1:1 call on SFT.

Needs releases with:

• GitHub link to other pull request

Testing

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• I have added automated test to this contribution

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PR Post Submission Checklist for internal contributors (Optional)

• Wire's Github Workflow has automatically linked the PR to a JIRA issue

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PR Post Merge Checklist for internal contributors

• If any soft of configuration variable was introduced by this PR, it has been added to the relevant documents and the CI jobs have been updated.

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References

1. https://sparkbox.com/foundry/semantic_commit_messages
2. https://github.com/wireapp/.github#usage
3. E.g. feat(conversation-list): Sort conversations by most emojis in the title #SQPIT-764.

[github-actions]

Test Results

2 926 tests   2 803 ✔️  22s ⏱️
   497 suites     123 💤
   497 files           0 ❌

Results for commit 31cbd6a.

♻️ This comment has been updated with latest results.

[datadog-wireapp]

Datadog Report

All test runs 0d96325 🔗

✅ 2 Total Test Services: 0 Failed, 2 Passed

Test Services

Service Name	Failed	Known Flaky	New Flaky	Passed	Skipped	Total Time	Test Service View
kalium-ios	0	0	0	2802	123	1.26s	Link
kalium-jvm	0	0	0	2953	107	5.09s	Link

[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 SonarCloud

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release/android-cycle-4.6@9eafc77). Learn more about missing BASE report.

Additional details and impacted files

@@                     Coverage Diff                      @@
##             release/android-cycle-4.6    #3000   +/-   ##
============================================================
  Coverage                             ?   58.54%           
  Complexity                           ?        7           
============================================================
  Files                                ?     1188           
  Lines                                ?    46921           
  Branches                             ?     4470           
============================================================
  Hits                                 ?    27471           
  Misses                               ?    17457           
  Partials                             ?     1993           

Files with missing lines	Coverage Δ
.../kalium/logic/feature/call/scenario/OnCloseCall.kt	81.57% <100.00%> (ø)
...tlin/com/wire/kalium/logic/data/call/CallHelper.kt	55.55% <100.00%> (ø)

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