Only upload 3 sets of test results to codecov (possible workaround for hanging builds)

[barrywhart]

Brief summary of the change made

Fixes #4146

Only require (and upload) coverage reports for:

• Python 3.11
• dbt 1.3.0
• Python Windows

Allegedly, uploading fewer coverage reports makes the coverage portion of the CI build less likely to hang.

Are there any other side effects of this change that we should be aware of?

Pull Request checklist

• Please confirm you have completed any of the necessary steps below.

• Included test cases to demonstrate any code changes, which may be one or more of the following:

  • .yml rule test cases in test/fixtures/rules/std_rule_cases.
  • .sql/.yml parser test cases in test/fixtures/dialects (note YML files can be auto generated with tox -e generate-fixture-yml).
  • Full autofix test cases in test/fixtures/linter/autofix.
  • Other.

• Added appropriate documentation for the change.

• Created GitHub issues for any relevant followup/future enhancements if appropriate.

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (af18908) compared to base (71d6cdb).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #4147   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          195       195           
  Lines        14922     14920    -2     
=========================================
- Hits         14922     14920    -2     

Impacted Files	Coverage Δ
src/sqlfluff/__init__.py	100.00% <ø> (ø)
src/sqlfluff/core/cached_property.py	100.00% <ø> (ø)

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[greg-finley]

Mind fixing the few coverage gaps it has now?

[greg-finley]

Would be nice to put some comment that old versions don't have coverage. So hopefully the next person, when 3.12 comes out, will know to put 3.11 in this list and put 3.12 on line 62.

[greg-finley]

ditto about comment to help us when bumping this version in the future

[greg-finley]

There might be a syntax like if ... a certain matrix value, then run coverage. Like how this page mentions - if: ${{ matrix.npm }}. Would be great if we can keep the original matrix and just run the coverage step conditionally vs having to copy all the steps.

[barrywhart]

The if syntax doesn't seem well documented to me. Let's save that for a future PR.

[barrywhart]

@greg-finley: Ready for another review. Addressed everything except adding if. I'm afraid trying to do that could open a can of worms -- this is all the time I can spare to work on this today.

[greg-finley]

Awesome, looks great!