Suggest using hash overload for Animator.Play

We already suggest converting a string name to a hash for various methods, such as `Animator.SetInteger`. We should do the same for `Animator.Play`. Bonus points is the extracted `Animator.StringToHash` can still suggest animation state names.

Start by finding the existing suggestion for converting string names to hashes in methods such as Animator.SetInteger, then trace how it handles Animator.Play. Add equivalent coverage for Animator.Play while preserving suggestions for animation state names extracted through Animator.StringToHash; verify the relevant analyzer tests if present.

Written by the indexing model from the issue text.