[native] [22/34] ReactNav6: Move keyboardHandlingEnabled to StackOptions
Summary:
Context on change here.
Depends on D5414
Test Plan: Flow + ran the app on my phone and played around with it
Reviewers: atul, tomek, bartek
Reviewed By: atul
Subscribers: abosh
Differential Revision: https://phab.comm.dev/D5415