This option is used for --stress-snapshot when sharing the RO heap. The
RO heap is shared, so deserializing non-startup snapshots need to ensure
they use the same RO object cache mapping as the startup snapshot.

Cq-Include-Trybots: luci.v8.try:v8_linux64_gc_stress_custom_snapshot_dbg_ng
Bug: v8:11750
Change-Id: Ia2baa24d5b7d494ef5b7ff3c9cbcee846881182e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2897945Reviewed-by: Dan Elphick <delphick@chromium.org>
Commit-Queue: Shu-yu Guo <syg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#74574}