We add new alternative "new_object" in order to
emit new struct and array types. We check whether
heaptype is struct or array type so we could emit
"NewDefault" or "NewWithRtt". The additional methods
(IsArray/StructType, GetArray/StructType)  was added to WasmModuleBuilder.

Bug: v8:11954
Change-Id: I7a0e73edfbaa49beb1efd60b0f1b9916dc50df22
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3056459Reviewed-by: Thibaud Michaud <thibaudm@chromium.org>
Commit-Queue: Rakhim Khismet <khismet@google.com>
Cr-Commit-Position: refs/heads/master@{#75966}