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/safeAssignment.fir.txt

@@ -54,5 +54,6 @@ FILE fqName:<root> fileName:/safeAssignment.kt
             BRANCH
               if: CONST Boolean type=kotlin.Boolean value=true
               then: CALL 'public final fun <set-x> (<set-?>: kotlin.Int): kotlin.Unit declared in <root>.C' type=kotlin.Unit origin=EQ
-                $this: GET_VAR 'val tmp_0: <root>.C? [val] declared in <root>.test' type=<root>.C? origin=null
+                $this: TYPE_OP type=<root>.C origin=IMPLICIT_CAST typeOperand=<root>.C
+                  GET_VAR 'val tmp_0: <root>.C? [val] declared in <root>.test' type=<root>.C? origin=null
                 <set-?>: CONST Int type=kotlin.Int value=42