ipaautomountkey: 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
- `required` tags need to be fixed according to the `argument_spec`
- `aliases` tag need to be consistent to `argument_spec`
- `authors` needs to be given with the github user also: `Name (@user)`
- `extends_documentation_fragment: ipamodule_base_docs` needs added and
  `ipaadmin_*` parameters need to be removed
- `choices` needs to be replaced with `aliases` to match `argument_spec`

argument_spec
- `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
- `required=None` needs to be replaced by `required=False`

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