Utils: Rename the new Storage to Store

Apparently that's what the young people on the web use for such a thing.

Change-Id: I75d5396ff3cb3c26efd6008b5f2261354c4f7896
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/libs/utils/store.cpp

@@ -0,0 +1,9 @@
+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#include "store.h"
+
+
+namespace Utils {
+
+} // Utils