dillon1000/react

Replace SuspenseConfig object with an integer (#19706)

Now that the options in SuspenseConfig are no longer supported, the
only thing we use it for is to track whether an update is part of
a transition.

I've renamed `ReactCurrentBatchConfig.suspense` to
`ReactCurrentBatchConfig.transition`, and changed the type to a number.
The number is always either 0 or 1. I could have made it a boolean;
however, most likely this will eventually be either a Lane or an
incrementing identifier.

The `withSuspenseConfig` export still exists until we've removed
all the callers from www.