Clean up module documentation (#36909)

* Clean up module documentation

This PR includes:
- Removal of `default: None` (and variations)
- Removal of `required: false`
- Fixing booleans and `type: bool` where required

* Fix remaining (new) validation issues

lib/ansible/utils/module_docs_fragments/nxos.py

@@ -30,7 +30,6 @@ options:
       - For more information please see the L(NXOS Platform Options guide, ../network/user_guide/platform_nxos.html).
       - HORIZONTALLINE
       - A dict object containing connection details.
-    default: null
     suboptions:
       host:
         description:
@@ -44,7 +43,6 @@ options:
             device.  This value applies to either I(cli) or I(nxapi).  The port
             value will default to the appropriate transport common port if
             none is provided in the task.  (cli=22, http=80, https=443).
-        required: false
         default: 0 (use common port)
       username:
         description:
@@ -53,22 +51,18 @@ options:
             either the CLI login or the nxapi authentication depending on which
             transport is used. If the value is not specified in the task, the
             value of environment variable C(ANSIBLE_NET_USERNAME) will be used instead.
-        required: false
       password:
         description:
           - Specifies the password to use to authenticate the connection to
             the remote device.  This is a common argument used for either I(cli)
             or I(nxapi) transports. If the value is not specified in the task, the
             value of environment variable C(ANSIBLE_NET_PASSWORD) will be used instead.
-        required: false
-        default: null
       timeout:
         description:
           - Specifies the timeout in seconds for communicating with the network device
             for either connecting or sending commands.  If the timeout is
             exceeded before the operation is completed, the module will error.
             NX-API can be slow to return on long-running commands (sh mac, sh bgp, etc).
-        require: false
         default: 10
         version_added: 2.3
       ssh_keyfile:
@@ -77,7 +71,6 @@ options:
             the remote device.  This argument is only used for the I(cli)
             transport. If the value is not specified in the task, the
             value of environment variable C(ANSIBLE_NET_SSH_KEYFILE) will be used instead.
-        required: false
       transport:
         description:
           - Configures the transport connection to use when connecting to the
@@ -89,21 +82,19 @@ options:
         description:
           - Configures the I(transport) to use SSL if set to true only when the
             C(transport=nxapi), otherwise this value is ignored.
-        required: false
-        default: no
-        choices: ['yes', 'no']
+        type: bool
+        default: 'no'
       validate_certs:
         description:
           - If C(no), SSL certificates will not be validated. This should only be used
             on personally controlled sites using self-signed certificates.  If the transport
             argument is not nxapi, this value is ignored.
-        choices: ['yes', 'no']
-        default: null
+        type: bool
       use_proxy:
         description:
           - If C(no), the environment variables C(http_proxy) and C(https_proxy) will be ignored.
+        type: bool
         default: 'yes'
-        choices: ['yes', 'no']
         version_added: "2.5"
 
 notes: