fix: inconsistent copy re: groups vs conversation - WPB-24863

[johnxnguyen]

WPB-24863 [iOS] [Groups] Naming is inconsistent when deleting or leaving a group by user

Issue

There is some inconsistent copy concerning groups and conversations, in particular when deleting a conversation. For instance, the action to delete the conversation has the label Delete conversation and tapping it results in a confirmation alert that asks Delete group?.

This PR adjusts the copy to align the terminology toward conversation instead of group, in the alert confirmation and also in the description of the admin.

Testing

1. Open app
2. Navigate to a team group conversation that you have created
3. Go to conversation details
4. Tap on the ... button in the foot, then "Delete conversation"
5. Assert the copy says "conversation" instead of "group".

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Checklist

• Title contains a reference JIRA issue number like [WPB-XXX].
• Description is filled and free of optional paragraphs.
• Adds/updates automated tests.

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UI accessibility checklist

If your PR includes UI changes, please utilize this checklist:

• Make sure you use the API for UI elements that support large fonts.
• All colors are taken from WireDesign.ColorTheme or constructed using WireDesign.BaseColorPalette.
• New UI elements have Accessibility strings for VoiceOver.

[github-actions]

Test Results

1 881 tests   1 854 ✅  2m 10s ⏱️
  301 suites     27 💤
    1 files        0 ❌

Results for commit 547a8bf.

♻️ This comment has been updated with latest results.

Summary: workflow run #25326448476

[datadog-wireapp]

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 547a8bf | Docs | Give us feedback!}

[samwyndham]

LGTM

[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