Support underscores in non local destructuring declarations

compiler/testData/codegen/script/destructuringDeclarationUnderscore.kts

@@ -0,0 +1,9 @@
+val (_, b, _) = A()
+
+class A {
+    operator fun component1(): Int = throw RuntimeException()
+    operator fun component2() = 2
+    operator fun component3(): Int = throw RuntimeException()
+}
+
+// expected: b: 2