[interpreter] Add support for scalable operands.

test/cctest/interpreter/bytecode_expectations/BreakableBlocks.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: mixed
 execute: yes
 wrap: yes
 
 ---
 snippet: "
   var x = 0;
   label: {
     x = x + 1;
     break label;
     x = x + 1;
   }
   return x;
 "
 frame size: 2
 parameter count: 1
 bytecode array length: 17
 bytecodes: [
   B(StackCheck),
   B(LdaZero),
   B(Star), R(0),
   B(Star), R(1),
-  B(LdaSmi8), U8(1),
+  B(LdaSmi), U8(1),
   B(Add), R(1),
   B(Star), R(0),
   B(Jump), U8(2),
   B(Ldar), R(0),
   B(Return),
 ]
 constant pool: [
 ]
 handlers: [
 ]
@@ skipping 15 matching lines @@
 parameter count: 1
 bytecode array length: 75
 bytecodes: [
   B(StackCheck),
   B(LdaZero),
   B(Star), R(0),
   B(LdaZero),
   B(Star), R(1),
   B(Ldar), R(1),
   B(Star), R(3),
-  B(LdaSmi8), U8(10),
+  B(LdaSmi), U8(10),
   B(TestLessThan), R(3),
   B(JumpIfFalse), U8(57),
   B(StackCheck),
   B(LdaZero),
   B(Star), R(2),
   B(Ldar), R(2),
   B(Star), R(3),
-  B(LdaSmi8), U8(3),
+  B(LdaSmi), U8(3),
   B(TestLessThan), R(3),
   B(JumpIfFalse), U8(35),
   B(StackCheck),
   B(Ldar), R(0),
   B(ToNumber),
   B(Inc),
   B(Star), R(0),
   B(Ldar), R(1),
   B(Star), R(3),
   B(Ldar), R(2),
   B(Add), R(3),
   B(Star), R(4),
-  B(LdaSmi8), U8(12),
+  B(LdaSmi), U8(12),
   B(TestEqual), R(4),
   B(JumpIfFalse), U8(4),
   B(Jump), U8(18),
   B(Ldar), R(2),
   B(ToNumber),
   B(Inc),
   B(Star), R(2),
   B(Jump), U8(-41),
   B(Ldar), R(1),
   B(ToNumber),
@@ skipping 24 matching lines @@
   B(LdaConstant), U8(0),
   B(Star), R(3),
   B(Ldar), R(closure),
   B(Star), R(4),
   B(CallRuntime), U16(Runtime::kPushBlockContext), R(3), U8(2),
   B(PushContext), R(2),
   B(LdaTheHole),
   B(StaContextSlot), R(context), U8(4),
   B(CreateClosure), U8(1), U8(0),
   B(Star), R(0),
-  B(LdaSmi8), U8(10),
+  B(LdaSmi), U8(10),
   B(StaContextSlot), R(context), U8(4),
   B(Ldar), R(0),
   B(JumpIfNotHole), U8(11),
   B(LdaConstant), U8(2),
   B(Star), R(3),
   B(CallRuntime), U16(Runtime::kThrowReferenceError), R(3), U8(1),
   B(Star), R(1),
   B(Jump), U8(2),
   B(PopContext), R(2),
   B(LdaUndefined),
@@ skipping 22 matching lines @@
 "
 frame size: 6
 parameter count: 1
 bytecode array length: 131
 bytecodes: [
   B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
   B(PushContext), R(2),
   B(LdaTheHole),
   B(StaContextSlot), R(context), U8(4),
   B(StackCheck),
-  B(LdaSmi8), U8(1),
+  B(LdaSmi), U8(1),
   B(StaContextSlot), R(context), U8(4),
   B(LdaConstant), U8(0),
   B(Star), R(4),
   B(Ldar), R(closure),
   B(Star), R(5),
   B(CallRuntime), U16(Runtime::kPushBlockContext), R(4), U8(2),
   B(PushContext), R(3),
   B(LdaTheHole),
   B(StaContextSlot), R(context), U8(4),
   B(CreateClosure), U8(1), U8(0),
   B(Star), R(0),
-  B(LdaSmi8), U8(2),
+  B(LdaSmi), U8(2),
   B(StaContextSlot), R(context), U8(4),
   B(Ldar), R(0),
   B(JumpIfNotHole), U8(11),
   B(LdaConstant), U8(2),
   B(Star), R(4),
   B(CallRuntime), U16(Runtime::kThrowReferenceError), R(4), U8(1),
   B(Star), R(1),
   B(LdaContextSlot), R(context), U8(4),
   B(JumpIfNotHole), U8(11),
   B(LdaConstant), U8(3),
   B(Star), R(4),
   B(CallRuntime), U16(Runtime::kThrowReferenceError), R(4), U8(1),
   B(JumpIfToBooleanFalse), U8(6),
   B(PopContext), R(3),
   B(Jump), U8(27),
-  B(LdaSmi8), U8(3),
+  B(LdaSmi), U8(3),
   B(Star), R(4),
   B(LdaContextSlot), R(context), U8(4),
   B(JumpIfNotHole), U8(11),
   B(LdaConstant), U8(3),
   B(Star), R(5),
   B(CallRuntime), U16(Runtime::kThrowReferenceError), R(5), U8(1),
   B(Ldar), R(4),
   B(StaContextSlot), R(context), U8(4),
   B(PopContext), R(3),
-  B(LdaSmi8), U8(4),
+  B(LdaSmi), U8(4),
   B(Star), R(4),
   B(LdaContextSlot), R(context), U8(4),
   B(JumpIfNotHole), U8(11),
   B(LdaConstant), U8(4),
   B(Star), R(5),
   B(CallRuntime), U16(Runtime::kThrowReferenceError), R(5), U8(1),
   B(Ldar), R(4),
   B(StaContextSlot), R(context), U8(4),
   B(LdaUndefined),
   B(Return),
 ]
 constant pool: [
   InstanceType::FIXED_ARRAY_TYPE,
   InstanceType::SHARED_FUNCTION_INFO_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
   InstanceType::ONE_BYTE_INTERNALIZED_STRING_TYPE,
 ]
 handlers: [
 ]