dillon1000/react

[Fresh] Always reset useMemoCache on Fast Refresh (#30700)

Stacked on https://github.com/facebook/react/pull/30662.

Alternative to https://github.com/facebook/react/pull/30663 and
https://github.com/facebook/react/pull/30677.

During a Fast Refresh, we always want to evict the memo cache, same as
we do with normal `useMemo`. The mechanism used by `useMemo` and other
Hooks is this module-level variable:


https://github.com/facebook/react/blob/fca5d655d78917400a2722287351c20938166669/packages/react-reconciler/src/ReactFiberHooks.js#L304-L307

which has DEV-only behavior as if the dependencies are always different:


https://github.com/facebook/react/blob/fca5d655d78917400a2722287351c20938166669/packages/react-reconciler/src/ReactFiberHooks.js#L451-L460

The `useMemoCache` Hook doesn't use a dependency array but conceptually
I think we want the same behavior.

## Test Plan

The test passes.

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Co-authored-by: Lauren Tan <[email protected]>