arrow

GH-45451: [C#] Integration with Grpc.Net.ClientFactory (#45458)



### Rationale for this change

See https://github.com/apache/arrow/issues/45451. This adds out of the box compatibility with the [Grpc.Net.ClientFactory](https://learn.microsoft.com/en-us/aspnet/core/grpc/clientfactory?view=aspnetcore-9.0), library, which is fairly standardized for users making gRPC requests in .NET web applications.

### What changes are included in this PR?

Added a new constructor to `FlightClient` that accepts a `CallInvoker` instance.

`public FlightClient(CallInvoker callInvoker)`

### Are these changes tested?

Yes, added a unit test to resolve an instance of the `FlightClient` using the `Grpc.Net.ClientFactory` integration and made a request with it.

### Are there any user-facing changes?

Yes, a new overload constructor of `FlightClient` was added.

* GitHub Issue: #45451

Authored-by: Robert Cao <robert.cao@relativity.com>
Signed-off-by: Curt Hagenlocher <curt@hagenlocher.org>