fix: ignore invalid leaf signature error on slow sync [WPB-15737]

[Garzas]

WPB-15737 [Android] app stuck on login

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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?

Issues

On non recoverable error Tried to add invalid LeafNode: Invalid LeafNode signature we are not ignoring this on slow sync during JOINING_MLS_CONVERSATIONS which is blocking user for using app

Solutions

Ignore this error during slow sync

[github-actions]

Test Results

3 357 tests  +1   3 249 ✅ +1   5m 59s ⏱️ +36s
  572 suites ±0     108 💤 ±0 
  572 files   ±0       0 ❌ ±0 

Results for commit 6d58a9d. ± Comparison against base commit ba4e228.

♻️ This comment has been updated with latest results.

[datadog-wireapp]

Datadog Report

Branch report: fix/ignore-mls-error-on-joining-conversation
Commit report: bf67c35
Test service: kalium-jvm

✅ 0 Failed, 3249 Passed, 108 Skipped, 1m 1.43s Total Time

[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

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 77.77778% with 2 lines in your changes missing coverage. Please review.

Project coverage is 54.52%. Comparing base (ba4e228) to head (6d58a9d).

Files with missing lines	Patch %	Lines
...onversation/JoinExistingMLSConversationsUseCase.kt	87.50%	0 Missing and 1 partial ⚠️
.../wire/kalium/network/exceptions/KaliumException.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                  Coverage Diff                  @@
##           release/candidate    #3266      +/-   ##
=====================================================
- Coverage              54.52%   54.52%   -0.01%     
=====================================================
  Files                   1252     1252              
  Lines                  36623    36629       +6     
  Branches                3710     3712       +2     
=====================================================
+ Hits                   19968    19971       +3     
- Misses                 15253    15255       +2     
- Partials                1402     1403       +1     

Files with missing lines	Coverage Δ
...ire/kalium/network/exceptions/NetworkErrorLabel.kt	100.00% <ø> (ø)
...onversation/JoinExistingMLSConversationsUseCase.kt	97.36% <87.50%> (-2.64%)	⬇️
.../wire/kalium/network/exceptions/KaliumException.kt	78.57% <0.00%> (-1.43%)	⬇️

... and 1 file with indirect coverage changes

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