build: turn on custom V8 snapshot by default

This patch re-enables custom V8 snapshot integration. Also renames
the experimental configure switch from `--with-node-snapshot`
to `--without-node-snapshot` to be consistent with`--without-snapshot`
which is used for the default V8 snapshot.

PR-URL: #28181
Refs: #27365
Refs: #17058
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: joyeecheung

configure.py

@@ -421,10 +421,10 @@
     dest='with_ltcg',
     help='Use Link Time Code Generation. This feature is only available on Windows.')
 
-parser.add_option('--with-node-snapshot',
+parser.add_option('--without-node-snapshot',
     action='store_true',
-    dest='with_node_snapshot',
-    help='Turn on V8 snapshot integration. Currently experimental.')
+    dest='without_node_snapshot',
+    help='Turn off V8 snapshot integration. Currently experimental.')
 
 intl_optgroup.add_option('--download',
     action='store',
@@ -942,11 +942,9 @@ def configure_node(o):
   o['variables']['want_separate_host_toolset'] = int(
       cross_compiling and want_snapshots)
 
-  if options.with_node_snapshot:
-    o['variables']['node_use_node_snapshot'] = 'true'
+  if not options.without_node_snapshot:
+    o['variables']['node_use_node_snapshot'] = b(not cross_compiling)
   else:
-    # Default to false for now.
-    # TODO(joyeecheung): enable it once we fix the hashseed uniqueness
     o['variables']['node_use_node_snapshot'] = 'false'
 
   if target_arch == 'arm':