Split the runtime function for initializing a promise into AwaitPromisesInit
and AwaitPromisesInitOld, the former not firing the INIT hook and being used
by the AwaitOptimized builtin. In addition to this the AsyncHooks now caches
all the previously inited promises and checks that the init hook is not fired
twice for the same promise.

Modified test expectations for the new async ids in the async hooks tests.

Bug: v8:8300
Change-Id: If4a17e501b2a233578fa70b6442f219473f001d9
Reviewed-on: https://chromium-review.googlesource.com/c/1280442
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56642}