Extend code coverage to be more meaningful

[mikhailshilkov]

I noticed two issues with existing code coverage stats:

1. Only in-module data are collected, e.g. tests in the github.com/pulumi/pulumi-go-provider/tests module don't output coverage data for github.com/pulumi/pulumi-go-provider
2. The examples and tests folders have coverage data for its resource implementation code.

This PR changes the arguments to collect data for all submodules of github.com/pulumi/pulumi-go-provider but to exclude examples and tests/grpc in codecov itself.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.08%. Comparing base (ade261c) to head (5bc7401).

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #278       +/-   ##
===========================================
+ Coverage   38.32%   71.08%   +32.75%     
===========================================
  Files          45       33       -12     
  Lines        4717     4098      -619     
===========================================
+ Hits         1808     2913     +1105     
+ Misses       2745      921     -1824     
- Partials      164      264      +100     

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[iwahbe]

Why shouldn't tests/grpc count against coverage? Everything in a testing dir should be part of a test, and thus count against coverage.

Suggested change

	# Examples implementatio and test code should not count against coverage.
	# Examples implementation and test code should not count against coverage.

[mikhailshilkov]

As I understand it, it's a part of tests, not an object being tested. Do we want to see the percentage of lines covered in that folder?

[iwahbe]

I think it's useful as a sanity check on the tests. If there are tests that have low coverage percentages, its a good indicator that something has gone wrong in testing.

I don't feel strongly either way, but I do think that code coverage on the tests themselves is helpful.

[mikhailshilkov]

I don't feel strong either - I'll return it to err on the side of more data

[pulumi-bot]

This PR has been shipped in release v0.23.0.