dillon1000/react

[compiler] Context variables as dependencies (#31582)

We previously didn't track context variables in the hoistable values
sidemap of `propagateScopeDependencies`. This was overly conservative as
we *do* track the mutable range of context variables, and it is safe to
hoist accesses to context variables after their last direct / aliased
maybe-assignment.

```js
function Component({value}) {
  // start of mutable range for `x`
  let x = DEFAULT;
  const setX = () => x = value;
  const aliasedSet = maybeAlias(setX);
  maybeCall(aliasedSet);
  // end of mutable range for `x`

  // here, we should be able to take x (and property reads
  // off of x) as dependencies
  return <Jsx value={x} />
}
```
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* #31583
* __->__ #31582