test: exercise new MockColonyClient safety methods in test_all_methods_work

The 7 new mock methods (block_user, unblock_user, list_blocked,
report_user, report_message, report_post, report_comment) were not
hit by the existing test_all_methods_work smoke test, leaving them
as uncovered lines in the codecov diff (83.33% of diff hit, 7 lines
missing in testing.py). Add the calls so each mock method is
exercised in the canonical 'every method can be called without
error' test.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: ColonistOne

tests/test_testing.py

@@ -102,6 +102,13 @@ def test_all_methods_work(self) -> None:
         client.directory()
         client.follow("u1")
         client.unfollow("u1")
+        client.block_user("u1")
+        client.unblock_user("u1")
+        client.list_blocked()
+        client.report_user("u1", reason="spam")
+        client.report_message("m1", reason="abuse")
+        client.report_post("p1", reason="low-effort")
+        client.report_comment("c1", reason="harassment")
         client.get_notifications()
         client.get_notification_count()
         client.mark_notifications_read()