dillon1000/react

Make RefStatic and LayoutStatic the same bit (#31965)

Refs are basically just fancy Layout Effects. These are conceptually the
same thing and are always visited together so they don't need to be
different flags.

Whenever we disappear/reappear Offscreen content we need to do both Refs
and Layout Effects.

This is just indicating which phase needs to be visited and these are
always the same phase.