## Summary
Mostly changing the casting syntax from `(x: Y)` to `x as Y`, as the old
syntax was deprecated and always causing an error in Flow
## How did you test this change?
`yarn flow-ci`
`Error.prepareStackTrace` is non-standard feature and not all JavaScript
runtimes implement the methods that we are using in React DevTools
backend.
This PR adds additional checks for the presence of the methods that we
are using.
Follow up to #34093.
There's an issue where the skipFrames argument isn't part of the cache
key so the other parsers that expect skipping one frame might skip zero
and show the internal `fakeJSXDEV` callsite. Ideally we should include
the skipFrames as part of the cache key but we can also always just skip
one.
We'll need complete parsing of stack traces for both owner stacks and
async debug info so we need to expand the stack parsing capabilities a
bit. This refactors the source location extraction to use some helpers
we can use for other things too.
This is a fork of `ReactFlightStackConfigV8` which also supports
DevTools requirements like checking both `react_stack_bottom_frame` and
`react-stack-bottom-frame` as well as supporting Firefox stacks.
It also supports extracting the first frame of a component stack or the
last frame of an owner stack for the source location.
