Add aliases for image load/save (#303)

To be compatible with docker_image_load module add 'path' options
as aliases.

plugins/modules/podman_load.py

@@ -22,6 +22,8 @@ options:
     - Path to image file to load.
     type: str
     required: true
+    aliases:
+      - path
   executable:
     description:
       - Path to C(podman) executable if it is not in the C($PATH) on the
@@ -167,7 +169,7 @@ def load(module, executable):
 def main():
     module = AnsibleModule(
         argument_spec=dict(
-            input=dict(type='str', required=True),
+            input=dict(type='str', required=True, aliases=['path']),
             executable=dict(type='str', default='podman')
         ),
         supports_check_mode=True,

plugins/modules/podman_save.py

@@ -32,6 +32,8 @@ options:
     - Destination file to write image to.
     type: str
     required: true
+    aliases:
+      - path
   format:
     description:
     - Save image to docker-archive, oci-archive (see containers-transports(5)), oci-dir
@@ -116,7 +118,7 @@ def main():
         argument_spec=dict(
             image=dict(type='str', required=True),
             compress=dict(type='bool'),
-            dest=dict(type='str', required=True),
+            dest=dict(type='str', required=True, aliases=['path']),
             format=dict(type='str', choices=['docker-archive', 'oci-archive', 'oci-dir', 'docker-dir']),
             multi_image_archive=dict(type='bool'),
             force=dict(type='bool', default=True),