[breaking] Eliminate BoardListWatchRequest Interrupt from the grpc api and make it server streaming only

[alessio-perugini]

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• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• UPGRADING.md has been updated with a migration guide (for breaking changes)
• configuration.schema.json updated if new parameters are added.

What kind of change does this PR introduce?

We removed the streaming part of the client side.

What is the current behavior?

We have bidirectional streaming of client<-> server and we leverage the use of Interrupt field to stop the communication.

What is the new behavior?

We simply make this server streaming only and we remove the Interrupt field from the API.

Does this PR introduce a breaking change, and is titled accordingly?

We removed the Interrupt field from BoardListWatchRequest message.
We removed the stream of BoardListWatchRequest in the BoardListWatch rpc:

  rpc BoardListWatch(BoardListWatchRequest)
      returns (stream BoardListWatchResponse);

Other information

[codecov]

Codecov Report

Patch coverage: 50.00% and project coverage change: -0.01% ⚠️

Comparison is base (29c70df) 63.08% compared to head (9268feb) 63.07%.
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2330      +/-   ##
==========================================
- Coverage   63.08%   63.07%   -0.01%     
==========================================
  Files         200      201       +1     
  Lines       19260    19233      -27     
==========================================
- Hits        12150    12132      -18     
+ Misses       6061     6050      -11     
- Partials     1049     1051       +2     

Flag	Coverage Δ
unit	63.07% <50.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
internal/cli/board/list.go	9.33% <0.00%> (+0.18%)	⬆️
commands/daemon/daemon.go	26.60% <50.00%> (-1.08%)	⬇️
commands/board/list.go	58.70% <60.00%> (ø)

... and 34 files with indirect coverage changes

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[umbynos]

Remember to update the PR message and update UPGRADING.md since this is a breaking change.

[alessio-perugini]

Remember to update the PR message and update UPGRADING.md since this is a breaking change.