Motivation:
Improve code efficiency by replacing runtime calls with manually
written turbofan code where possible.

Changes:
- Remove the runtime functions `Runtime_WasmNewMultiReturnFixedArray`
  and `Runtime_WasmNewMultiReturnJSArray` and replace them with
  turbofan code.
- Introduce the builtin function `WasmAllocateJSArray`.

R=clemensb@chromium.org
R=ecmziegler@chromium.org
R=jkummerow@chromium.org

Change-Id: Idc0db39286c4242392c0422919bbc8fd7bedf2af
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2143816Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Emanuel Ziegler <ecmziegler@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Manos Koukoutos <manoskouk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67472}