[CodeCompletion] Add test case for some/any type relations

This test case used to fail at some point but it’s passing now. Add it so that we don’t break it in the future.

rdar://97897857

Author: ahoppen

test/IDE/complete_type_relation_any_some.swift

@@ -0,0 +1,23 @@
+// RUN: %empty-directory(%t)
+// RUN: %swift-ide-test -batch-code-completion -source-filename %s -filecheck %raw-FileCheck --completion-output-dir %t
+
+protocol Shape {}
+
+struct Square : Shape {}
+
+struct Test {
+  let protocolType: Shape
+  let structType: Square
+
+  func testAny() -> any Shape {
+    return self.#^WITH_ANY_CONTEXTUAL_TYPE^#
+// WITH_ANY_CONTEXTUAL_TYPE-DAG: Decl[InstanceVar]/CurrNominal/TypeRelation[Convertible]: protocolType[#any Shape#];
+// WITH_ANY_CONTEXTUAL_TYPE-DAG: Decl[InstanceVar]/CurrNominal/TypeRelation[Convertible]: structType[#Square#];
+  }
+
+  func testSome() -> some Shape {
+    return self.#^WITH_SOME_CONTEXTUAL_TYPE^#
+// WITH_SOME_CONTEXTUAL_TYPE-DAG: Decl[InstanceVar]/CurrNominal: protocolType[#any Shape#];
+// WITH_SOME_CONTEXTUAL_TYPE-DAG: Decl[InstanceVar]/CurrNominal/TypeRelation[Convertible]: structType[#Square#];
+  }
+}