Move fstab to tools

Signed-off-by: Katarzyna Treder <katarzyna.treder@h-partners.com>

test_tools/fstab.py

@@ -0,0 +1,21 @@
+#
+# Copyright(c) 2019-2021 Intel Corporation
+# Copyright(c) 2024 Huawei Technologies Co., Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+#
+
+from test_tools import fs_utils
+from test_utils import systemd
+
+
+def add_mountpoint(device, mount_point, fs_type, mount_now=True):
+    fs_utils.append_line("/etc/fstab",
+                         f"{device.path} {mount_point} {fs_type.name} defaults 0 0")
+    systemd.reload_daemon()
+    if mount_now:
+        systemd.restart_service("local-fs.target")
+
+
+def remove_mountpoint(device):
+    fs_utils.remove_lines("/etc/fstab", device.path)
+    systemd.reload_daemon()