[Analysis API] add tests for containing declaration for delegated member scope

analysis/analysis-api/testData/components/containingDeclarationProvider/containingDeclarationByDelegatedMemberScope/delegation.kt

@@ -0,0 +1,8 @@
+interface A<T> {
+    fun x(): T
+    fun y()
+    val c: T
+    val c: Int
+}
+
+class B<caret>B(a: A<Int>): A<Int> by a

analysis/analysis-api/testData/components/containingDeclarationProvider/containingDeclarationByDelegatedMemberScope/delegation.txt

@@ -0,0 +1,7 @@
+fun x(): Int fromClass BB
+
+fun y() fromClass BB
+
+val c: Int fromClass BB
+
+constructor(a: A<Int>) fromClass BB