[CIS-1580] Fix "Only visible to you" shown when deleted messages visible for all users

[nuno-vieira]

🔗 Issue Link

CIS-1580

🎯 Goal

Fix the "Only visible to you" label being displayed when the ChatClientConfig is set to .alwaysVisible.

🛠 Implementation

Applied Solution:
The current implementation is done in the ChatMessageListVC. When the layout options are provided, we override them and remove the .onlyVisibleToYou label in case the config is not the .onlyVisibleToCurrentUser.

Alternative Solution:
It would make more sense to implement this directly in the ChatMessageLayoutOptionsResolver, but this would add a bit of complexity because we would need to inject the ChatClientConfig in the ChatMessageLayoutOptionsResolver. We can't inject it in the constructor, otherwise, we would break the API, and so it would be weird to have an optional chat client config in the resolver, causing it to be error-prone since a customer could easily forget to add the config as a property. For these reasons, the first implementation was the most simple one.

🧪 Testing

1. Launch the Demo App
2. Tap on the Configuration button and set the .alwaysVisible for deleted messages.
3. Enter a channel and delete a message
4. Deleted messages should not show the "Only Seen by You” label

☑️ Contributor Checklist

• I have signed the Stream CLA (required)
• Changelog is updated with client-facing changes
• New code is covered by unit tests
• This change follows zero ⚠️ policy (required)
• Comparison screenshots added for visual changes
• Affected documentation updated (docusaurus, tutorial, CMS)

[adamrushy]

LGTM ✅

[codecov]

Codecov Report

Merging #1847 (0eb4339) into develop (35d3cc3) will increase coverage by 0.15%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1847      +/-   ##
===========================================
+ Coverage    85.45%   85.60%   +0.15%     
===========================================
  Files          245      245              
  Lines        11911    11911              
===========================================
+ Hits         10179    10197      +18     
+ Misses        1732     1714      -18     

Flag	Coverage Δ
llc-tests	85.60% <ø> (+0.15%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
Sources/StreamChat/Utils/Logger/Logger.swift	56.28% <0.00%> (+5.98%)	⬆️
...Chat/WebSocketClient/BackgroundTaskScheduler.swift	83.87% <0.00%> (+12.90%)	⬆️

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