Update junos_config.py (#62221)

Add the commands alias to match UX of IOS, EOS etc.

(cherry picked from commit 991b865cb6)

changelogs/fragments/junos_config_lines_alias.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- junos_config - Add commands alias to lines option to be in sync with other platforms (https://github.com/ansible/ansible/pull/62221)

lib/ansible/modules/network/junos/junos_config.py

@@ -371,7 +371,7 @@ def main():
         dir_path=dict(type='path')
     )
     argument_spec = dict(
-        lines=dict(type='list'),
+        lines=dict(aliases=['commands'], type='list'),
 
         src=dict(type='path'),
         src_format=dict(choices=['xml', 'text', 'set', 'json']),