deps: V8: workaround V8 leak w track constant fields

track_constant_fields exposes a large regression in memory leak due
to a suspected memory leak. Disable this until a proper fix is ready.

Ref: https://bugs.chromium.org/p/v8/issues/detail?id=9507
Ref: nodejs#28205

common.gypi

@@ -38,7 +38,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.15',
+    'v8_embedder_string': '-node.16',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/src/flag-definitions.h

@@ -1044,7 +1044,7 @@ DEFINE_IMPLICATION(trace_ic, log_code)
 DEFINE_GENERIC_IMPLICATION(
     trace_ic, TracingFlags::ic_stats.store(
                   v8::tracing::TracingCategoryObserver::ENABLED_BY_NATIVE))
-DEFINE_BOOL_READONLY(track_constant_fields, true,
+DEFINE_BOOL_READONLY(track_constant_fields, false,
                      "enable constant field tracking")
 DEFINE_BOOL_READONLY(fast_map_update, false,
                      "enable fast map update by caching the migration target")