dillon1000/react

[Fiber] Don't reaquire HostSingletons during dev effect validation (#37113)

Stacked on #37112

In dev effects are validated using a double-invoke technique. To do this
the effects are destroyed and recreated during a validation traversal.
However this same disappear and reappear path is used when Offscreen
Fibers go hidden and HostSingletons have unique behavior when going
hidden. So now that the double invoke effects process happens during
hydration it is more common to have your Singletons be released and
acquired during this validation phase which is observable most notably
by having extra attributes removed from them. The prior commits in this
stack deal with preserving non-react owned attributes on release however
it is semantically incorrect to release and acquire the singleton during
this validation because it isn't really an effect, it simply lives in
this traversal to avoid having to do another traversal during the
commit.

This change adds a bit of info to the release and acquire path to only
conditionally perform the necessary reacquire flow if we are not in the
validation phase.