[PECOBLR-954] Close statements based on Execute Statement Response SEA

[madhav-db]

Description

Close statements based on Execute Statement Response SEA

Flow:

1. User calls executeQuery
2. executeInternal in DatabricksStatement is called, and creates direct same thread executor
3. Runs on same thread, calls getResultFromClient
4. After execution, server responds with status: CLOSED, we detect the state and call markAsClosed which soft closes the statement (does not shut down the executor)
5. We return result set to user
6. User calls statement.close()
7. DatabricksStatement sees isClosed=true, skips the server close (since it's already closed), closes result set and shuts down the executor.

Testing

Additional Notes to the Reviewer

[gopalldb]

Description

Close statements based on Execute Statement Response SEA

Testing

Additional Notes to the Reviewer

Add testing section