doc_fragments: Clean up parameter types (database) (#52178)

* module_utils: Clean up parameter types (database)

This PR includes:

- Parameter types added
- Copyright format fixes
- Short license statement
- Description fixes (only for a few files, then I stopped :-))

* Fix validate-modules test ignores

lib/ansible/plugins/doc_fragments/proxysql.py

@@ -1,3 +1,5 @@
+# -*- coding: utf-8 -*-
+
 # Copyright: (c) 2017, Ansible Project
 # GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt
 
@@ -5,26 +7,31 @@
 class ModuleDocFragment(object):
 
     # Documentation fragment for ProxySQL connectivity
-    CONNECTIVITY = '''
+    CONNECTIVITY = r'''
 options:
   login_user:
     description:
       - The username used to authenticate to ProxySQL admin interface.
+    type: str
   login_password:
     description:
       - The password used to authenticate to ProxySQL admin interface.
+    type: str
   login_host:
     description:
       - The host used to connect to ProxySQL admin interface.
+    type: str
     default: '127.0.0.1'
   login_port:
     description:
       - The port used to connect to ProxySQL admin interface.
+    type: int
     default: 6032
   config_file:
     description:
       - Specify a config file from which I(login_user) and I(login_password)
         are to be read.
+    type: path
     default: ''
 requirements:
    - PyMySQL (Python 2.7 and Python 3.X), or
@@ -32,7 +39,7 @@ requirements:
 '''
 
     # Documentation fragment for managing ProxySQL configuration
-    MANAGING_CONFIG = '''
+    MANAGING_CONFIG = r'''
 options:
   save_to_disk:
     description: