dillon1000/react

[Flight] do not emit error after abort (#30683)

When synchronously aborting in a non-async Function Component if you
throw after aborting the task would error rather than abort because
React never observed the AbortSignal.

Using a sigil to throw after aborting during render isn't effective b/c
the user code itself could throw so insteead we just read the request
status. This is ok b/c we don't expect any tasks to still be pending
after the currently running task finishes.

However I found one instance where that wasn't true related to
serializing thenables which I've fixed so we may find other cases. If we
do, though it's almost certainly a bug in our task bookkeeping so we
should just fix it if it comes up.

I also updated `abort` to not set the status to ABORTING unless the
status was OPEN. we don't want to ever leave CLOSED or CLOSING status