Teach TurboFan about the maps produced by JSPerformPromiseThen and
JSCreatePromise, which yields a ~1-2% improvement on the doxbee
promises benchmark by removing the redundant checks from the optimized
code with promise chaining.

Bug: v8:7253
Change-Id: If0edce8ba15917c1b7e76b9d06490cfffe911650
Reviewed-on: https://chromium-review.googlesource.com/c/1288639Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56778}