Ruby: extract m in "m = Module.new()" as a tag with module kind

[codecov[bot]]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (e4cb2a0) 85.33% compared to head (febd452) 85.33%.

Files	Patch %	Lines
parsers/ruby.c	95.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #3907 +/- ## ========================================== - Coverage 85.33% 85.33% -0.01% ========================================== Files 234 234 Lines 55966 55960 -6 ========================================== - Hits 47757 47751 -6 Misses 8209 8209 ```

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