[x64][ia32] Activate Argument Count Consistency

Activate argument count consistency (receiver is always included in
JS argument count) for x64 and ia32.

Bug: v8:11112
Change-Id: If60000b6566846c84f1042473d25d79bf5c86a9d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3160198
Auto-Submit: Patrick Thier <pthier@chromium.org>
Reviewed-by: Victor Gomes <victorgomes@chromium.org>
Commit-Queue: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76838}

BUILD.gn

@@ -351,7 +351,8 @@ declare_args() {
   # parameter count of function with JS linkage.
   # TODO(v8:11112): Remove once all architectures support the flag and it is
   # enabled unconditionally.
-  v8_include_receiver_in_argc = false
+  v8_include_receiver_in_argc =
+      v8_current_cpu == "x86" || v8_current_cpu == "x64"
 }
 
 # Derived defaults.