Revert of [snapshot] Move builtins generation into mksnapshot

test/cctest/cctest.status

 # Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 179 matching lines @@
   # BUG(v8:6133).
   'test-cpu-profiler/TickEvents': [SKIP],
 }],  # 'tsan == True'
 
 ##############################################################################
 ['no_snap == True', {
   # Slow tests.
   'test-api/ExternalWrap': [PASS, SLOW],
   'test-api/FastReturnValues*': [PASS, SLOW],
   'test-decls/CrossScriptReferences_Simple2': [PASS, SLOW],
-  # "WithWarmup" means starting from a snapshot, for which nosnap builds lack
-  # support.
-  'test-serialize/CustomSnapshotDataBlobWithWarmup': [SKIP],
-  'test-serialize/SnapshotDataBlobWithWarmup': [SKIP],
 }],  # 'no_snap == True'
 ['no_snap == False', {
   # FunctionEntryHooks require bootstrapping from scratch.
   'test-api/SetFunctionEntryHook': [SKIP],
 }],  # 'no_snap == False'
 
 ##############################################################################
 # TODO(machenbach): Fix application of '*'. Nosnap windows needs a separate
 # section to not overwrite the expectations for TestThatAlwaysFails.
 ['no_snap == True and system == windows', {
@@ skipping 189 matching lines @@
   'test-field-type-tracking/*': [SKIP],
   'test-parsing/*': [SKIP],
   'test-page-promotion/*': [SKIP],
   'test-decls/*': [SKIP],
   'test-log/*': [SKIP],
   'test-gap-resolver/*': [SKIP],
   'test-dtoa/*': [SKIP],
 }],  # variant == wasm_traps
 
 ]