Following up on https://crrev.com/c/3383775 I realized that we could
just use the existing %DebugPopPromise and %DebugPushPromise runtime
functions, which do exactly the same job as %DebugAsyncFunctionFinished
and %DebugAsyncFunctionResumed, and are already used in other places of
promise instrumentation.

We can also remove %DebugAsyncFunctionEntered and utilize the logic in
NewJSPromise() to deal with the various promise hooks, and otherwise go
with %DebugPushPromise for the debugger side.

Bug: chromium:1280519
Change-Id: I79c77236f19c8783161c1eee36d2a16d52c60e82
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3386382Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#78626}