[Flow202][native][skip-ci] [16/x] Type React.forwardRef input functions
Summary:
This is the native equivalent of D9769. The new version of Flow needs all function parameters to have typehints.
NOTE: CI will fail on this diff. I considered the possibility of fixing Flow errors BEFORE upgrading Flow, but it wasn't possible... in some cases, the fixes to support the new version of Flow caused errors in the old version. I could have hidden these type errors with $FlowFixMe lines and then later revert those, but that seemed like too much busy work.
Depends on D9999
Test Plan: Confirm the Flow errors go away
Reviewers: atul, tomek
Reviewed By: tomek
Differential Revision: https://phab.comm.dev/D10000