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

compiler/testData/diagnostics/tests/annotations/options/multiDeclaration.fir.kt

@@ -0,0 +1,7 @@
+@Target(AnnotationTarget.CLASS)
+annotation class My
+data class Pair(val a: Int, val b: Int)
+fun foo(): Int {
+    val (@My private a, @My public b) = Pair(12, 34)
+    return a + b
+}