Reverting https://chromium-review.googlesource.com/c/v8/v8/+/1741660

This fixed one bug but caused a lot of others and on balance I think
reverting it is the lesser evil.

This also fixed generator-relocation.js because
(function*(){}).constructor is the function constructor and we try to
set a breakpoint on line 3.

Bug: chromium:109362, chromium:1028689
Fixes: v8:9721
Change-Id: I1bfe6ec57ce77ea7292df91266311f5c0194947e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1940259
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65232}