delegate_to: accept only string for delegation host (#43473)
delegate_to: accept only string for delegation host (#43473)

delegate_to parameter in task only accepts string,
this fix will error out if other datatypes are provided instead of
string.

Signed-off-by: Abhijeet Kasurde <6334fd0c217b1f2a15926284df229acde5b4fc3a@redhat.com>
thaim/ansible,thaim/ansible