Reflect.deleteProperty now is a Torque builtins, also containing fast
path for proxy object.

Bug: v8:6664
Change-Id: I76d6fba2c9d05d991132957783d987a190585ec8
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1704943
Commit-Queue: Z Nguyen-Huu <duongn@microsoft.com>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62813}