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

compiler/testData/diagnostics/tests/secondaryConstructors/initializationFromOtherInstance.fir.kt

@@ -0,0 +1,15 @@
+class A {
+    val x: Int
+    val y: Int
+    constructor(x: Int, y: Int) {
+        this.x = x
+        this.y = y
+    }
+    constructor(other: A) {
+        x = other.x
+        y = other.y
+    }
+}
+class A1(val x: Int, val y: Int) {
+    constructor(other: A1): this(other.x, other.y)
+}