Moving the experimental grpc module to the core

[olegbespalov]

What?

We are moving the experimental GRCP module to the core.

It is worth to review by commits, but in short:

• Porting xk6-grpc into core: I'm moving packages of the xk6-grpc module to the k6, most of the existing code of the existing grpc code is the same, that's why we get the modified and as the bonus git history remains for most existing code. This commit also removes the xk6-grpc dependecy.
• Warning about experimental GRPC implements warning to switch to the core module.
• Porting test grpc_service Ports grpc test service, to be able to run the GRPC examples
• Adds integration tests for the GRPC module Moves the integration tests

Why?

The main feature of the experimental module (streaming) works as expected. We're ready to move forward.

Checklist

• I have performed a self-review of my code.
• I have added tests for my changes.
• I have run linter locally (make lint) and all checks pass.
• I have run tests locally (make tests) and all tests pass.
• I have commented on my code, particularly in hard-to-understand areas.

Related PR(s)/Issue(s)

Closes #3152

[codecov-commenter]

Codecov Report

Attention: 93 lines in your changes are missing coverage. Please review.

Comparison is base (bfdc446) 73.21% compared to head (fc40970) 72.40%.

❗ Current head fc40970 differs from pull request most recent head f8fdddd. Consider uploading reports for the commit f8fdddd to get more accurate results

Files	Patch %	Lines
lib/testutils/grpcservice/service.go	68.08%	25 Missing and 5 partials ⚠️
...httpmultibin/grpc_wrappers_testing/test_grpc.pb.go	25.00%	26 Missing and 1 partial ⚠️
js/modules/k6/grpc/grpc.go	60.71%	14 Missing and 8 partials ⚠️
js/modules/k6/grpc/client.go	76.92%	3 Missing and 3 partials ⚠️
lib/netext/grpcext/conn.go	77.77%	2 Missing and 2 partials ⚠️
cmd/tests/grpc.go	90.47%	1 Missing and 1 partial ⚠️
...tils/httpmultibin/grpc_wrappers_testing/service.go	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3490      +/-   ##
==========================================
- Coverage   73.21%   72.40%   -0.82%     
==========================================
  Files         267      274       +7     
  Lines       20083    20847     +764     
==========================================
+ Hits        14704    15094     +390     
- Misses       4465     4782     +317     
- Partials      914      971      +57     

Flag	Coverage Δ
ubuntu	?
windows	72.40% <64.09%> (-0.68%)	⬇️

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[mstoykov]

It kind of makes more sense to me to move the warning logic to this file only so that the grpc parts are left only about the actual implementation.

Also will be easier to remove as you need to modify only here.

[olegbespalov]

🤔 I assumed that this would be executed even if no module imports were in the script, no? 🤔 so it is either moving this logic to the module's resolver or...

On the other side, the clean up isn't hard and I even could sketch up a PR for a long term milestone for it

[oleiade]

👏🚀