[FE] Fix exception from the 'UnusedChecker' on a destructuring

^KT-55973 Fixed

analysis/analysis-api/testData/components/diagnosticsProvider/diagnostics/unusedDestructuring.kt

@@ -0,0 +1,11 @@
+class Test {
+    private fun test(x: Int, y: Int) {
+        val (_, _) = invert(x, y)
+    }
+
+    private fun invert(x: Int, y: Int): Point {
+        return Point(-x, -y)
+    }
+}
+
+data class Point(val x: Int, val y: Int)