Flight SQL Server missing command type.googleapis.com/arrow.flight.protocol.sql.CommandGetXdbcTypeInfo

[c-thiel]

Describe the bug
In the flight SQL servers' get_flight_info method, there currently is no method for the
The command itself is defined here:

arrow-rs/arrow-flight/src/sql/arrow.flight.protocol.sql.rs

Line 104 in 6b17775

pub struct CommandGetXdbcTypeInfo {

It should be implemented in this match:

arrow-rs/arrow-flight/src/sql/server.rs

Line 320 in ee40033

match Command::try_from(message).map_err(arrow_error_to_status)? {

as well as the Server Trait.

Expected behavior
I can implement all Flight SQL Commands without overwriting get_flight_info or using the Fallback.

Further Motivation
This command is actually quite common. When using PowerBI and the Dremio ODBC / Flight driver to connect to a flight server, it get's issued right before the preview of any dataset.

[tustvold]

label_issue.py automatically added labels {'arrow'} from #4055

[tustvold]

label_issue.py automatically added labels {'arrow-flight'} from #4055