The existing implementation included aspects that are not
straight-forward to implement in Liftoff and seemed inefficient:
* Convert the timeout in WebAssembly code from I64 to F64, just to
  convert it back in the runtime.
  * On 32-bit platforms this conversion needs an additional C-call.
* Split the I64 expected value from I64 into two I32 values in the
  wasm-compiler.
  * Ideally the int64-lowering takes care of 32-bit specific handling.

With this CL the timeout and the expected value are passed as I64 to
the runtime (a builtin moves the I64 into a bigint for that). The
int64-lowering takes care of 32-bit platforms. There are special
builtins for 32-bit platforms, but they are written such that ideally
also the int64-lowering could create them.

R=jkummerow@chromium.org, binji@chromium.org

Bug: v8:10108
Change-Id: I2dbba5839779961b1c5bde4c23fc3f38f1895a52
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2071867
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Ben Smith <binji@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66497}