Skip Override Snap Resource Test

## Overview
The override test has been quite unreliable lately. Let's disable the test until we have better mechanisms to test this scenario.

tests/integration/test_k8s.py

@@ -193,7 +193,7 @@ async def test_verbose_config(kubernetes_cluster: model.Model):
         assert rc == 0, f"Failed to run 'ps axf' on {all_units[idx].name}: {stderr}"
         assert all("--v=3" for line in stdout.splitlines() if " /snap/k8s" in line)
 
-
+@pytest.mark.skip(reason="Flaky test")
 @pytest.mark.abort_on_fail
 async def test_override_snap_resource(override_snap_on_k8s: application.Application):
     """Override snap resource."""