[AA] Add tests for combined declared member scopes

^KT-61800

analysis/analysis-api/testData/components/scopeProvider/combinedDeclaredMemberScope/class.kt

@@ -0,0 +1,31 @@
+package test
+
+abstract class A {
+    fun perform() { }
+
+    val x: Int = 0
+
+    class C1
+
+    object O1
+
+    companion object {
+        val y: Int = 0
+    }
+}
+
+class C : A() {
+    fun foo(): Int = 5
+
+    val bar: String = ""
+
+    class C2
+
+    object O2
+
+    companion object {
+        val baz: String = ""
+    }
+}
+
+// class: test/C