Add a NoChannel type

[atthom]

I reported the changes from csvance/gRPCClient2.jl#27

There are still some warning in the Protobuf.jl file, because I used the main ProtoBuf.jl, not the forked version with codegen capabilities

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 70.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.41%. Comparing base (ad578fd) to head (6c8a607).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/Curl.jl	72.22%	5 Missing ⚠️
src/Streaming.jl	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #80      +/-   ##
==========================================
- Coverage   84.98%   84.41%   -0.57%     
==========================================
  Files           7        7              
  Lines         526      539      +13     
==========================================
+ Hits          447      455       +8     
- Misses         79       84       +5     

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[atthom]

It seems breaking on 1.10 on windows

[csvance]

@atthom It's probobly more that the specific test that is failing isn't particuarly well designed in this case. The changes look great, this is an extremely elegant way to fix the JET errors without having to resort to un-idiomatic Julia code. My attempt to correct the JET issues looked horrendous compared to this.

[csvance]

@atthom Github runners have been extremely flaky lately, it even made the news. The test passed now. If you are finished with the changes we can get them merged.

[atthom]

Perfect, let's merge