[analyzer] Lock down a few behaviors of DeprecatedMemberUseVerifier.

In a follow-up CL, I plan to rework the `DeprecatedMemberUseVerifier`
class in a way that allows it to be more easily extended to support
the `@experimental` annotation. This CL adds some unit tests for some
behaviors of `DeprecatedMemberUseVerifier` that were not previously
tested, so that I won't accidentally regress them in the follow-up CL.

Change-Id: I6a6a696494843826f3f9213c3191910369aa4ba2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/450361
Commit-Queue: Paul Berry <[email protected]>
Reviewed-by: Samuel Rawlins <[email protected]>

Author: stereotype441

pkg/analyzer/test/src/diagnostics/deprecated_member_use_test.dart

@@ -1316,6 +1316,40 @@ class A {
 ''');
   }
 
+  test_methodInvocation_nonUseKind() async {
+    newFile('$workspaceRootPath/aaa/lib/a.dart', r'''
+class A {
+  @Deprecated.extend()
+  void foo() {}
+}
+''');
+
+    await assertNoErrorsInCode(r'''
+import 'package:aaa/a.dart';
+
+void f(A a) {
+  a.foo();
+}
+''');
+  }
+
+  test_methodInvocation_unrelatedAnnotation() async {
+    newFile('$workspaceRootPath/aaa/lib/a.dart', r'''
+class A {
+  @override
+  void foo() {}
+}
+''');
+
+    await assertNoErrorsInCode(r'''
+import 'package:aaa/a.dart';
+
+void f(A a) {
+  a.foo();
+}
+''');
+  }
+
   test_methodInvocation_withMessage() async {
     newFile('$workspaceRootPath/aaa/lib/a.dart', r'''
 class A {