Revert "[vm/bytecode] Enable bytecode compiler by default in Dart SDK"

This reverts commit bcca3c483b.

Reason for revert: Failures on vm-kernel-reload-linux-release-x64 bot.

Original change's description:
> [vm/bytecode] Enable bytecode compiler by default in Dart SDK
> 
> Change-Id: Ica9afac673e294734255a9fa8802ec05c2dde24c
> Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/110551
> Reviewed-by: Régis Crelier <regis@google.com>
> Reviewed-by: Siva Annamalai <asiva@google.com>
> Commit-Queue: Alexander Markov <alexmarkov@google.com>

TBR=rmacnak@google.com,alexmarkov@google.com,asiva@google.com,regis@google.com

Change-Id: I77ef8a0ccfafe6c6a5f309cd0e5ea7ca1b804846
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/117927
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>

runtime/runtime_args.gni

@@ -80,8 +80,8 @@ declare_args() {
     dart_component_kind = "static_library"
   }
 
-  # Controls whether the VM uses bytecode.
-  dart_platform_bytecode = true
+  # Whether the VM's platform dill file contains bytecode.
+  dart_platform_bytecode = false
 
   # Whether the VM includes the kernel service in all modes (debug, release,
   # product).

tools/gn.py

@@ -408,14 +408,9 @@ def parse_args(args):
     other_group.add_argument(
         '--bytecode',
         '-b',
-        help='Use bytecode in Dart VM',
-        default=True,
+        help='Include bytecode in the VMs platform dill',
+        default=False,
         action="store_true")
-    other_group.add_argument(
-        '--no-bytecode',
-        help='Disable bytecode in Dart VM',
-        dest='bytecode',
-        action="store_false")
     other_group.add_argument(
         '--clang', help='Use Clang', default=True, action='store_true')
     other_group.add_argument(