Feature: allow interception of any generic method call when using Arg.AnyType

[JMolenkamp]

Allow for interception of any call to a generic method, regardless of used generic argument.
Related to issue 854

[dtchepak]

Hi @JMolenkamp ,

Thanks a lot for this. Could you please add tests to this PR to demonstrate the change?

[JMolenkamp]

Added some tests. The first two fail without the change. The last one does not build without the change.

Maybe this PR needs to be split into two. Part of it is a fix for the first two tests, which should not fail, I think?
The other part is adding a MethodInfo property to CallInfo, allowing for something like the third test, which is similar to the use case that led me to make this PR.

[JMolenkamp]

Moved the fixes from this PR to #862. This PR now only contains the feature request.
It is dependent upon #862 though, the test for demonstration purposes will fail without it.

[dtchepak]

Thanks for this!
Merged in dependent PR. I think needs a rebase now.