[Java] Explore using Avatica as basis for Flight JDBC Driver

[asfimport]

Explore using Avatica as basis for Flight JDBC Driver to see how suitable it is compared to building the JDBC driver from the ground up.

Reporter: Andy Grove / @andygrove

_{Note: This issue was originally created as ARROW-7756. Please see the migration documentation for further details.}

[weiqxu]

I'm curious why using Avatica as the basis, why base the origin JDK class like "java.sql.Driver"

[lidavidm]

Well, this is irrelevant: the JDBC Flight SQL driver exists and is based on Avatica.