[mykolapavlov-dremio]

Summary

Fix Arrow Flight SQL JDBC prepared-statement batch handling for servers that emit one update result per parameter row.

The client now collects all update counts, exposes one count per batch entry, translates partial failures to BatchUpdateException, and releases response buffers on success and failure.

Changes

• Add executeUpdateBatch() to the Flight SQL prepared-statement client.
• Drain and close every PutResult.
• Make SyncPutListener safe against late callbacks during cleanup.
• Preserve counts received before a Flight failure.
• Translate batch failures to JDBC BatchUpdateException.
• Update JDBC batch tests and the mock producer for multiple results.

Test plan

• Verify a ten-row batch returns ten update counts.
• Verify a late server failure returns BatchUpdateException with partial counts.
• Verify connection close reports no Arrow allocator leak.

Related

• Server PR: https://github.com/dremio/dremio/pull/30885