[interpreter] Introduce fused bytecodes for common sequences.

test/cctest/interpreter/bytecode_expectations/CreateRestParameter.golden

 #
 # Autogenerated by generate-bytecode-expectations.
 #
 
 ---
 pool type: number
 execute: yes
 wrap: no
 test function name: f
 
@@ skipping 68 matching lines @@
 handlers: [
 ]
 
 ---
 snippet: "
   function f(a, ...restArgs) { return restArgs[0] + arguments[0]; }
   f();
 "
 frame size: 5
 parameter count: 2
-bytecode array length: 35
+bytecode array length: 34
 bytecodes: [
                 B(CreateUnmappedArguments),
                 B(Star), R(0),
                 B(CreateRestParameter),
                 B(Star), R(1),
                 B(LdaTheHole),
                 B(Star), R(2),
   /*   10 E> */ B(StackCheck),
                 B(Ldar), R(arg0),
                 B(Star), R(2),
   /*   29 S> */ B(Ldar), R(1),
                 B(Star), R(3),
   /*   44 E> */ B(LdaZero),
-                B(KeyedLoadIC), R(3), U8(1),
-                B(Star), R(4),
+                B(LdrKeyedProperty), R(3), U8(1), R(4),
   /*   50 E> */ B(Ldar), R(0),
                 B(Star), R(3),
   /*   59 E> */ B(LdaZero),
                 B(KeyedLoadIC), R(3), U8(3),
                 B(Add), R(4),
   /*   64 S> */ B(Return),
 ]
 constant pool: [
 ]
 handlers: [
 ]