[heap] Disable map space with --future

Get some test coverage before restarting the map space compaction finch
again. This should test whether slots in invalidated objects are now
properly ignored when the invalidated object is dead.

Bug: v8:12578
Change-Id: I5b6f30b97c2db895183216ae5d5dbd4e5fa9d0c5
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3676855Reviewed-by: Omer Katz <omerkatz@chromium.org>
Commit-Queue: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#80814}

src/flags/flag-definitions.h

@@ -533,7 +533,7 @@ DEFINE_WEAK_IMPLICATION(future, flush_baseline_code)
 DEFINE_WEAK_IMPLICATION(future, short_builtin_calls)
 #endif
 DEFINE_WEAK_NEG_IMPLICATION(future, write_protect_code_memory)
-DEFINE_WEAK_IMPLICATION(future, compact_maps)
+DEFINE_WEAK_NEG_IMPLICATION(future, use_map_space)
 
 DEFINE_BOOL_READONLY(dict_property_const_tracking,
                      V8_DICT_PROPERTY_CONST_TRACKING_BOOL,