[compiler] Switch to track setStates by aliasing and id instead of identifier names

Summary:
This makes the setState usage logic much more robust. We no longer rely on identifierName.

Now we track when a setState is loaded into a new promoted identifier variable and track this in a map `setStateLoaded` map.

For other types of instructions we consider the setState to be being used. In this case we record its usage into the `setStateUsages` map.



Test Plan:
We expect no changes in behavior for the current tests