FIR2IR: Fix complex cases of smart cast expressions used as dispatch receiver

It might be not only <ExpressionWithSmartCast>(a).foo(), but also
id(<ExpressionWithSmartCast>(a)).foo() and many other cases

compiler/testData/ir/irText/expressions/temporaryInInitBlock.kt.txt

@@ -13,10 +13,9 @@ class C {
       val tmp0_safe_receiver: Any? = x
       when {
         EQEQ(arg0 = tmp0_safe_receiver, arg1 = null) -> null
-        else -> tmp0_safe_receiver.toString()
+        else -> tmp0_safe_receiver /*as Any */.toString()
       }
     }
   }
 
 }
-