feat(devinfra): Add test coverage to CI to measure the covering code of unitest (Spark)

[Elssky]

Reason for this PR

solution to #189, extension of #580

What changes are included in this PR?

Add Spark test coverage to CI to measure the covering code of unitest### Are these changes tested?

Are there any user-facing changes?

no

[codecov-commenter]

Welcome to Codecov 🎉

Once you merge this PR into your default branch, you're all set! Codecov will compare coverage reports and display results in all future pull requests.

Thanks for integrating Codecov - We've got you covered ☂️

[SemyonSinchenko]

May we extend it to PySpark too? The coverage is already computed during the CI but it doesn't published. I see, that the Codecov tool has a support of pytest that is used for PySpark.

The entry point of PySpark tests is the Makefile:
https://github.com/apache/incubator-graphar/blob/main/pyspark/Makefile#L35

[Elssky]

May we extend it to PySpark too? The coverage is already computed during the CI but it doesn't published. I see, that the Codecov tool has a support of pytest that is used for PySpark.

The entry point of PySpark tests is the Makefile: https://github.com/apache/incubator-graphar/blob/main/pyspark/Makefile#L35

Sure, I'll keep track of this task👌

[acezen]

LGTM