Add missing include <initializer_list>

Closes #51238

GitOrigin-RevId: eb85431
Change-Id: Ic108d8f03016a688202914d268a5d107165787fd
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/280540
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Slava Egorov <vegorov@google.com>

Author: ntkme

runtime/vm/growable_array.h

@@ -10,6 +10,8 @@
 #ifndef RUNTIME_VM_GROWABLE_ARRAY_H_
 #define RUNTIME_VM_GROWABLE_ARRAY_H_
 
+#include <initializer_list>
+
 #include "platform/growable_array.h"
 #include "vm/thread_state.h"
 #include "vm/zone.h"