[interpreter] Add CreateFunctionContext bytecode

test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: mixed
 execute: yes
 wrap: yes
 
 ---
@@ skipping 106 matching lines @@
 snippet: "
   var n0 = 'a';
   var n1 = 'b';
   class N {
     [n0]() { return n0; }
     static [n1]() { return n1; }
   }
 "
 frame size: 11
 parameter count: 1
-bytecode array length: 126
+bytecode array length: 123
 bytecodes: [
-                B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
+                B(CreateFunctionContext), U8(6),
                 B(PushContext), R(3),
                 B(LdaTheHole),
                 B(Star), R(2),
   /*   30 E> */ B(StackCheck),
   /*   43 S> */ B(LdaConstant), U8(0),
   /*   43 E> */ B(StaContextSlot), R(context), U8(4),
   /*   57 S> */ B(LdaConstant), U8(1),
   /*   57 E> */ B(StaContextSlot), R(context), U8(5),
                 B(LdaTheHole),
                 B(Star), R(0),
@@ skipping 49 matching lines @@
 ]
 
 ---
 snippet: "
   var count = 0;
   class C { constructor() { count++; }}
   return new C();
 "
 frame size: 8
 parameter count: 1
-bytecode array length: 75
+bytecode array length: 72
 bytecodes: [
-                B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
+                B(CreateFunctionContext), U8(5),
                 B(PushContext), R(3),
                 B(LdaTheHole),
                 B(Star), R(2),
   /*   30 E> */ B(StackCheck),
   /*   46 S> */ B(LdaZero),
   /*   46 E> */ B(StaContextSlot), R(context), U8(4),
                 B(LdaTheHole),
                 B(Star), R(0),
   /*   49 S> */ B(LdaTheHole),
                 B(Star), R(4),
@@ skipping 19 matching lines @@
   /*  103 S> */ B(Return),
 ]
 constant pool: [
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
 ]
 handlers: [
 ]