fix: BQ partition utils intervals

[amstee]

👋 been having an issue with the query restriction generated by the connector when running in unbounded mode.

The BETWEEN operator is inclusive: begin and end values are included. this causes the source connector to read some of the data twice.

This change should fix that, let me know if there's any test I may have missed !

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[amstee]

@prashastia if you could review 🙏

[jayehwhyehentee]

/gcbrun

[amstee]

Hey, thanks for the review, any blocker @jayehwhyehentee ?

[jayehwhyehentee]

@amstee merged