ipaautomember: Fix documentation sections and agument spec

ansible-test with ansible-2.14 is adding a lot of new tests to ensure
that the documentation section and the agument spec is complete. Needed
changes:

DOCUMENTATION section

- `type: str` needs to be set for string parameters
- `elements: str` needs to be given for list of string parameters
- `suboptions` instead of `options` needs to be used for dict parameters
- `authors` needs to be given with the github user also: `Name (@user)`
- `required` tag was fixed according to the argument_spec

arguemnt_spec

- `elements="str"` needs to be added to all list of string parameters
- `no_log=False` or `no_log=True` needs to be set for all parameters
  that have `key` in the name or for dicts also in one the key names.

The `copyright` date is extended with `-2022`.