OS-Agent support (#2811)

* OS-Agent support

* add agent to host feature

* Add support for os-agent on devcontainer

* Rename core

* fix tests

* add setter

* add cgroup / apparmor

* all interfaces added

* fix import

* Add tests

* More tests

* Finish tests

* reformating xml files

* fix doc string

* address comments

* change return value

* fix tests

* Update supervisor/dbus/agent/__init__.py

Co-authored-by: Joakim Sørensen <joasoe@gmail.com>

* Update scripts/supervisor.sh

Co-authored-by: Joakim Sørensen <joasoe@gmail.com>

Co-authored-by: Joakim Sørensen <joasoe@gmail.com>

tests/dbus/agent/test_datadisk.py

@@ -0,0 +1,28 @@
+"""Test Datadisk/Agent dbus interface."""
+from pathlib import Path
+
+import pytest
+
+from supervisor.coresys import CoreSys
+from supervisor.exceptions import DBusNotConnectedError
+
+
+async def test_dbus_osagent_datadisk(coresys: CoreSys):
+    """Test coresys dbus connection."""
+    assert coresys.dbus.agent.datadisk.current_device is None
+
+    await coresys.dbus.agent.connect()
+    await coresys.dbus.agent.update()
+
+    assert coresys.dbus.agent.datadisk.current_device.as_posix() == "/dev/sda"
+
+
+async def test_dbus_osagent_datadisk_change_device(coresys: CoreSys):
+    """Change datadisk on device."""
+
+    with pytest.raises(DBusNotConnectedError):
+        await coresys.dbus.agent.datadisk.change_device(Path("/dev/sdb"))
+
+    await coresys.dbus.agent.connect()
+
+    assert await coresys.dbus.agent.datadisk.change_device(Path("/dev/sdb")) is None