[CVP] Exclude some mounts in test_mounted_file_systems

Change-Id: I84c16d655f84db57a1e6448100c928490b02ebfb
Related-PROD: PROD-30655
(cherry picked from commit 3218f17ee5dadd642de5352fac14440ca8f2f5a0)
diff --git a/test_set/cvp-sanity/tests/test_mounts.py b/test_set/cvp-sanity/tests/test_mounts.py
index b79e6db..dfb67e9 100644
--- a/test_set/cvp-sanity/tests/test_mounts.py
+++ b/test_set/cvp-sanity/tests/test_mounts.py
@@ -9,8 +9,10 @@
         # Get all mount points from each node in the group  with the next command: `df -h | awk '{print $1}'`
         # Check that all mount points are similar for each node in the group
     """
+    exclude_mounts = 'grep -v "overlay\|tmpfs\|shm\|Filesystem"'
     mounts_by_nodes = local_salt_client.cmd(tgt="L@"+','.join(nodes_in_group),
-                                            param="df -h | awk '{print $1}'",
+                                            param="df -h | awk '{print $1}'" +
+                                                  " |" + exclude_mounts,
                                             expr_form='compound')
 
     # Let's exclude cmp, kvm, ceph OSD nodes, mon, cid, k8s-ctl, k8s-cmp nodes