dillon1000/react

[Fizz] Do not reinsert stylesheets after initial insert (#27586)

The loading state tracking for suspensey CSS is too complicated. Prior
to this change it had a state it could enter into where a stylesheet was
already in the DOM but the loading state did not know it was inserted
causing a later transition to try to insert it again.

This fix is to add proper tracking of insertions on the codepaths that
were missing it. It also modifies the logic of when to suspend based on
whether the stylesheet has already been inserted or not.

This is not 100% correct semantics however because a prior commit could
have inserted a stylesheet and a later transition should ideally be able
to wait on that load before committing. I haven't attempted to fix this
yet however because the loading state tracking is too complicated as it
is and requires a more thorough refactor. Additionally it's not
particularly valuable to delay a transition on a loading stylesheet when
a previous commit also relied on that stylesheet but didn't wait for it
b/c it was sync. I will follow up with an improvement PR later

fixes: https://github.com/facebook/react/issues/27585