Call the @@hasInstance trap only when required by the spec.

Bug: chromium:1052647
Change-Id: I7a0a3133c7b6280c6a3215e379bf02e9c22ffe55
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2082560
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Sathya Gunasekaran  <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66558}