cmd_runner_fmt.as_fixed() now accepts list of args (#9893)

* cmd_runner_fmt.as_fixed() now accepts list of args

* update CmdRunner guide

* add changelog frag

* Update changelogs/fragments/9893-cmdrunner-as-fixed-args.yml

* fix overdoing in as_fixed()

plugins/module_utils/cmd_runner_fmt.py

@@ -78,7 +78,9 @@ def as_list(ignore_none=None, min_len=0, max_len=None):
     return _ArgFormat(func, ignore_none=ignore_none)
 
 
-def as_fixed(args):
+def as_fixed(*args):
+    if len(args) == 1 and is_sequence(args[0]):
+        args = args[0]
     return _ArgFormat(lambda value: _ensure_list(args), ignore_none=False, ignore_missing_value=True)