[compiler] Temporarily enable --turbo-direct-heap-access

This can be done since --local-heaps is also temporarily enabled. This
lets us perform a reverse finch trial and start testing out direct heap
access.

Bug: chromium:1125606, v8:7790
Change-Id: I746e459824aa345dec8184bccc21bbd54070e3b4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2396077Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Santiago Aboy Solanes <solanes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69718}

src/flags/flag-definitions.h

@@ -536,7 +536,7 @@ DEFINE_BOOL(block_concurrent_recompilation, false,
             "block queued jobs until released")
 DEFINE_BOOL(concurrent_inlining, false,
             "run optimizing compiler's inlining phase on a separate thread")
-DEFINE_BOOL(turbo_direct_heap_access, false,
+DEFINE_BOOL(turbo_direct_heap_access, true,
             "access kNeverSerialized objects directly from the heap")
 DEFINE_IMPLICATION(concurrent_inlining, turbo_direct_heap_access)
 DEFINE_IMPLICATION(turbo_direct_heap_access, local_heaps)