[Java][FlightRPC] Add options to JDBC to reuse credentials and cookies in getStream sub-clients #38576
Description
Describe the enhancement requested
In #38521 , the driver was changed to spawn entirely new connections when connecting to endpoints reported by GetFlightInfo for getStream() calls.
The previous behavior would be to use the same connection including all cookies and credentials. While it was not correct to use the same physical connection since the endpoints can differ, it may be valid to reuse the same cookies and credentials.
Component(s)
FlightRPC, Java