Fix module validation checks and remove old params (#39926)

This PR includes:
- Fixes to the majority of module validation issues
  (deliberate inconsistencies between docs and arg_spec)
- Removal of deprecated parameters 'method' and 'protocols'
- A few typos in the documentation

There are still some left-over validation errors, some are deliberate
(like doc strings as default to indicate ranges, etc.)

lib/ansible/modules/network/aci/aci_ap.py

@@ -202,8 +202,6 @@ def main():
         ap=dict(type='str', aliases=['app_profile', 'app_profile_name', 'name']),  # Not required for querying all objects
         description=dict(type='str', aliases=['descr'], required=False),
         state=dict(type='str', default='present', choices=['absent', 'present', 'query']),
-        method=dict(type='str', choices=['delete', 'get', 'post'], aliases=['action'], removed_in_version='2.6'),  # Deprecated starting from v2.6
-        protocol=dict(type='str', removed_in_version='2.6'),  # Deprecated in v2.6
     )
 
     module = AnsibleModule(