dillon1000/react

Generalize InlineUseMemo to inline IIFEs

This PR completes the refactor. We now do the following sequence: 

* ValidateUseMemo. This is a new pass that extracts just the validation logic 
from the existing InlineUseMemo. This was always being run before, so this pass 
also always runs. 

* DropManualMemoization. As before, this converts useMemo calls into an IIFE 
(immediately invoked function expression). 

* InlineImmediatelyInvokedFunctionExpressions (prev InlineUseMemo). This pass 
now inlines _all_ IIFEs, including both useMemo calls that were dropped as well 
as IIFEs that the user wrote. 

The motivation for this change is that some codebases use IIFEs as a workaround 
for lack of if expressions, but we're unable to optimize within function 
expressions. This is the reason we originally added inlining for useMemo, but 
given that IIFEs are common it makes sense to generalize the inlining. 

## Test Plan 

* Manually checked changes in output 

* Synced internally and tested on profile page, no issues observed. Also 
spot-checked some of the changes in ouput and it looks as expected.