fix(websocket): handle WebSocketStream connection failure

[mcollina]

Fixes #4732

When WebSocketStream fails to connect, return early after rejecting promises to avoid accessing undefined properties.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.22%. Comparing base (3388513) to head (39bb4b1).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4733      +/-   ##
==========================================
+ Coverage   92.94%   93.22%   +0.27%     
==========================================
  Files         109      109              
  Lines       33981    33985       +4     
==========================================
+ Hits        31584    31681      +97     
+ Misses       2397     2304      -93     

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