fix: for containers use root-disk detection cleverly (#11593)

root-disk implemented currently had issues where root
disk partitions getting modified might race and provide
incorrect results, to avoid this lets rely again back on
DeviceID and match it instead.

In-case of containers `/data` is one such extra entity that
needs to be verified for root disk, due to how 'overlay'
filesystem works and the 'overlay' presents a completely
different 'device' id - using `/data` as another entity
for fallback helps because our containers describe 'VOLUME'
parameter that allows containers to automatically have a
virtual `/data` that points to the container root path this
can either be at `/` or `/var/lib/` (on different partition)

pkg/disk/root_disk.go

@@ -25,13 +25,5 @@ func IsRootDisk(diskPath string, rootDisk string) (bool, error) {
 		// On windows this function is not implemented.
 		return false, nil
 	}
-	info, err := GetInfo(diskPath)
-	if err != nil {
-		return false, err
-	}
-	rootInfo, err := GetInfo(rootDisk)
-	if err != nil {
-		return false, err
-	}
-	return SameDisk(info, rootInfo), nil
+	return SameDisk(diskPath, rootDisk)
 }