[CSharp] Update AZ0002 to understand `RequestOptions`

LLC generates methods where the last parameter is a `RequestOptions`. In this cases, the `RequestOptions` type holds a `CancellationToken` so we should not flag cases where methods which take a `RequestOptions`.

We are suppressing this error today in some LLC's and we should remove that when this work is done.

Start by locating the AZ0002 analyzer and the LLC-generated methods that take RequestOptions. Check how RequestOptions and its CancellationToken are currently handled, then review the existing LLC suppressions. Done means AZ0002 no longer flags these methods and the corresponding suppressions can be removed.

Written by the indexing model from the issue text.