Small improvements in Taskfile about protocol buffer generation

[cmaglie]

Please check if the PR fulfills these requirements

See how to contribute

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• The PR follows
  our contributing guidelines
• 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?

Makes task protoc handle some common cases.

What is the current behavior?

• task protoc fails if the buf format changes the formatting of the protoc files, since the other tasks are run in parallel the .proto files may be changed while being read by other processes:

  $ task protoc
  task: [protoc:breaking-change-detection] buf breaking --against '.git#branch=origin/master,subdir=rpc'
  task: [protoc:format] buf format --write --exit-code
  task: [protoc:check] buf lint
  task: [protoc:compile] buf dep update
  Failure: context canceled
  Failure: context canceled
  Failure: context canceled
  

• task protoc:format fails if the buf format changes the formatting of the protoc files due to the --exit-code flag:

  $ task protoc:format
  task: [protoc:format] buf format --write --exit-code
  task: Failed to run task "protoc:format": exit status 100
  

What is the new behavior?

task protoc and task protoc:format works as expected.

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

No

Other information

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.59%. Comparing base (0a116e7) to head (f0c02d6).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2793      +/-   ##
==========================================
- Coverage   67.60%   67.59%   -0.02%     
==========================================
  Files         238      238              
  Lines       22374    22374              
==========================================
- Hits        15126    15123       -3     
- Misses       6060     6062       +2     
- Partials     1188     1189       +1     

Flag	Coverage Δ
unit	67.59% <ø> (-0.02%)	⬇️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.