fix response close for getRowsUpdated(#1538)

[wooEnrico]

Summary

Mono resource manager for updateCount close the response when complete

Checklist

Delete items not relevant to your PR:

• Unit and integration tests covering the common scenarios were added
• A human-readable description of the changes was provided to include in CHANGELOG
• For significant changes, documentation in https://github.com/ClickHouse/clickhouse-docs was updated with further explanations or tutorials

[CLAassistant]

All committers have signed the CLA.

[chernser]

@wooEnrico would you please resubmit your PR? I have accidently merge it but it broke com.clickhouse.r2dbc.spi.test.R2DBCTestKitImplTest.segmentSelectWithEmitsRow what is part of 3rd-party test library.

Please also put more description about why this change is needed and what is the problem with current code.

Thanks!

[wooEnrico]

I have improved the submission and passed the unit test. And I hope you can review #1667 again