Ensure that EventEmitterWrapper is cleaned up as soon as a View is deleted

Summary:
In T92179998, there is a crash when an EventEmitterWrapper is deallocated after the JS VM is torn down, and the EventEmitterWrapper tries to free its JSI::Pointer reference (double-free).

To make sure this happens less/not at all, free EventEmitterWrappers on ViewState when a view is deleted, instead of waiting for all of RN to be torn down.

Changelog: [Internal]

Reviewed By: fkgozali

Differential Revision: D29020768

fbshipit-source-id: 9d72a23bc9966992ef56c1e3ee523405d4333194