e2e BigQueryMultiTable Additional Test Scenarios

[itsmekumari]

@itsankit-google @rmstar Please review. cc @sawantpritam

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[rmstar]

Please fix conflicts

[itsmekumari]

Please fix conflicts

Conflicts resolved.

[itsankit-google]

Please resolve conflicts

[itsmekumari]

Please resolve conflicts

Conflicts resolved.

[itsmekumari]

We should also test Multi Database Table Source -> BQMT sink. That's the primary usecase for multi table plugins

Will add the case once automation of Multi Database table source plugin is done. Created a task for reference https://cdap.atlassian.net/browse/CDAP-19189

[itsmekumari]

Can we also add a test using multisource to multisink? And also test the functionality using runtime arguments - multisink.<table_name>=<schema> with Allow Flexible Schemas set to false

As previously commented, will add the case once automation of Multi Database table source plugin is done. Created a task for reference https://cdap.atlassian.net/browse/CDAP-19189. Also, for 2nd point is it multitablesource to BQMT sink with macros, Please elaborate point 2.