docker provider: Don't explode when removing an image if it is in use

Handles the slightly different error text when podman backend is used:
`Stderr: Error response from daemon: image xxx is in use: image used by yyy: image is in use by a container: consider listing external containers and force-removing image
`

plugins/providers/docker/driver.rb

@@ -225,8 +225,9 @@ def rmi(id)
         execute('docker', 'rmi', id)
         return true
       rescue => e
-        return false if e.to_s.include?("is using it")
-        return false if e.to_s.include?("is being used")
+        return false if e.to_s.include?("is using it") or
+                        e.to_s.include?("is being used") or
+                        e.to_s.include?("is in use")
         raise if !e.to_s.include?("No such image")
       end