feat(llc): allow overridding websocket baseUrl

[kanat]

Ticket

• https://linear.app/stream/issue/CHA-546/push-notification-template-bug

Related PR

• https://github.com/GetStream/chat/pull/7924
• https://github.com/GetStream/chat/pull/7913

CLA

• I have signed the Stream CLA (required).
• The code changes follow best practices
• Code changes are tested (add some information if not applicable)

Description of the pull request

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 60.16%. Comparing base (7ed1709) to head (6a9a2a4).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
packages/stream_chat/lib/src/ws/websocket.dart	81.81%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2093   +/-   ##
=======================================
  Coverage   60.15%   60.16%           
=======================================
  Files         372      372           
  Lines       22773    22781    +8     
=======================================
+ Hits        13699    13706    +7     
- Misses       9074     9075    +1     

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[xsahil03x]

LGTM