Implement TryFrom<primitive> for Arrow Flight protobuf Enums

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.**
I am trying to implement a flight server.
As such, for example in the ``get_flight_info_sql_info`` method, we get a ``CommandGetSqlInfo`` result.
It's `.info` field is of type `Vec`. I would like to get the original Semantic (enum) back, so a `Vec`

**Describe the solution you'd like**
Implement TryFrom or something similar to get the enum back from the primitive.
Prost might even be able to generate this by adding `#[derive(::prost::Enumeration)]`:
https://docs.rs/prost/0.11.8/prost/index.html

**Describe alternatives you've considered**
Match all cases manually.

Start at the Arrow Flight server path containing get_flight_info_sql_info and inspect CommandGetSqlInfo.info, which currently exposes primitive values. Read the generated protobuf enum definitions and Prost's Enumeration support, then identify the existing enum conversion tests or add focused coverage; done means valid values can be converted to SqlInfo and invalid values are handled.

Written by the indexing model from the issue text.