[interpreter] Add support for scalable operands.

test/cctest/interpreter/bytecode_expectations/CallRuntime.golden

Index: test/cctest/interpreter/bytecode_expectations/CallRuntime.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/CallRuntime.golden b/test/cctest/interpreter/bytecode_expectations/CallRuntime.golden
index a4a44bcdce41ee42e6a37ac13748116f75a5104e..712273411bd6ff031021a9f45be451bf23f02f89 100644
--- a/test/cctest/interpreter/bytecode_expectations/CallRuntime.golden
+++ b/test/cctest/interpreter/bytecode_expectations/CallRuntime.golden
@@ -57,9 +57,9 @@ parameter count: 1
 bytecode array length: 15
 bytecodes: [
   B(StackCheck),
-  B(LdaSmi8), U8(1),
+  B(LdaSmi), U8(1),
   B(Star), R(0),
-  B(LdaSmi8), U8(2),
+  B(LdaSmi), U8(2),
   B(Star), R(1),
   B(CallRuntime), U16(Runtime::kAdd), R(0), U8(2),
   B(Return),
@@ -76,14 +76,14 @@ snippet: "
 "
 frame size: 2
 parameter count: 1
-bytecode array length: 16
+bytecode array length: 15
 bytecodes: [
   B(StackCheck),
   B(LdaUndefined),
   B(Star), R(0),
   B(CreateArrayLiteral), U8(0), U8(0), U8(3),
   B(Star), R(1),
-  B(CallJSRuntime), U16(116), R(0), U8(2),
+  B(CallJSRuntime), U8(116), R(0), U8(2),
   B(Return),
 ]
 constant pool: [