Solve Websocket error handling

[nesitor]

Problem: If the frontend or a user send and incorrect auth payload, the endpoint just stop sharing data without return anything or close the connection.

Solution: Handle error issues on the endpoint to always return status field and the reason why it's failing, and closing the connection.

[codecov]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 61.82%. Comparing base (35dd30a) to head (f46d898).

Files	Patch %	Lines
src/aleph/vm/orchestrator/views/operator.py	88.88%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #657      +/-   ##
==========================================
+ Coverage   61.75%   61.82%   +0.06%     
==========================================
  Files          68       68              
  Lines        5954     5959       +5     
  Branches      624      624              
==========================================
+ Hits         3677     3684       +7     
+ Misses       2126     2124       -2     
  Partials      151      151              

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