Move deopt_id and related helpers/definitions from Isolate to Thread

runtime/vm/compiler.h

Index: runtime/vm/compiler.h
diff --git a/runtime/vm/compiler.h b/runtime/vm/compiler.h
index f31e00ac76d68087f82358f0ea1aa555a548e0a1..9c3e73fbf67595b66e6b7288fff4689a5c745bdf 100644
--- a/runtime/vm/compiler.h
+++ b/runtime/vm/compiler.h
@@ -50,7 +50,7 @@ class Compiler : public AllStatic {
   static RawError* CompileOptimizedFunction(
       Thread* thread,
       const Function& function,
-      intptr_t osr_id = Isolate::kNoDeoptId);
+      intptr_t osr_id = Thread::kNoDeoptId);
 
   // Generates code for given parsed function (without parsing it again) and
   // sets its code field.