Nested inner exceptions are not filtered correctly

[mattjohnsonpint]

SDK Version

3.21.0

Steps to Reproduce

using Sentry;

using (SentrySdk.Init(o =>
       {
           o.Dsn = "https://eb18e953812b41c3aeb042e666fd3b5c@o447951.ingest.sentry.io/5428537";
           o.Debug = true;
           o.AddExceptionFilterForType<MyException>();
       }))
{
    throw new AggregateException(new MyException());
}

public class MyException : Exception
{
}

Expected Result

No exception should be sent, because it's been configured to be filtered out.

Actual Result

The exception is sent anyway, because it's an inner exception of another exception.

We already unwind inner exceptions and discard aggregates, but we appear to be filtering beforehand. We probably should still filter before, because we'd want to discard any child exceptions of a filtered exception also. We just need to walk the entire tree during the filtering process.

I haven't checked, but this probably applies to exception processors as well.