Looks like even the small amount of logic needed to extract ReadOnlyRoots
from a const Isolate* (e.g. a HeapObject check) is enough to cause
regressions.

Revert these predicates to take non-const Isolate*, while keeping const
Isolate* elsewhere. If we ever need const Isolate* for the oddball
predicates, we can add it in addition to the non-const one.

Bug: chromium:1029457
Bug: chromium:1030001
Bug: chromium:1030003
Bug: chromium:1030102
Change-Id: Ia6fa45f282a1a1961c0afa8ed973baebf6fbafd3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1948721Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#65331}