clang-tidy: add explicit deleted constructors

Found with cppcoreguidelines-special-member-functions

Signed-off-by: Rosen Penev <rosenp@gmail.com>

src/storage/plugins/UdisksStorage.cxx

@@ -93,6 +93,9 @@ public:
 		}
 	}
 
+	UdisksStorage(const UdisksStorage &) = delete;
+	UdisksStorage &operator=(const UdisksStorage &) = delete;
+
 	EventLoop &GetEventLoop() const noexcept {
 		return defer_mount.GetEventLoop();
 	}