fix: Clean up connections when user joins team (WPB-15263)

[thisisamir98]

WPB-15263 [Web] Cannot create 1:1 conversation with personal user that migrated to my team after cancelling connection request

Description

After the implementation of converting personal users to team users it turned out we need to clear any previous pending connection user A could possibly have with user B before user B joined user A's team.

in this PR we use user.update event to find out when a user has joined our team then:

If the user is our self user -> we delete all pending connections old previous - connections that are not accepted - with the new team members we find.

If the user is someone else -> we try to find if we have a pending old connection with them and delete it.

notes:

• A pending connection is a connection that's not accepted. for already accepted connections we will use the existing connection to interact with the newly joined to our team user.

[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

[przemvs]

lgtm

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 12.76596% with 41 lines in your changes missing coverage. Please review.

Project coverage is 46.11%. Comparing base (23f1db1) to head (70e60fd).
Report is 14 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #18579      +/-   ##
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- Coverage   46.14%   46.11%   -0.04%     
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  Files         870      875       +5     
  Lines       26801    26864      +63     
  Branches     6064     6077      +13     
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+ Hits        12368    12388      +20     
- Misses      12889    12929      +40     
- Partials     1544     1547       +3