[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/dataClasses/multiDeclarationFor.fir.kt

@@ -0,0 +1,10 @@
+// !CHECK_TYPE
+
+data class A(val x: Int, val y: String)
+
+fun foo(arr: Array<A>) {
+    for ((b, c) in arr) {
+        checkSubtype<Int>(b)
+        checkSubtype<String>(c)
+    }
+}