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/modules/network/cloudengine/ce_bfd_session.py

@@ -35,55 +35,41 @@ options:
             - Specifies the name of a BFD session.
               The value is a string of 1 to 15 case-sensitive characters without spaces.
         required: true
-        default: null
     create_type:
         description:
             - BFD session creation mode, the currently created BFD session
               only supports static or static auto-negotiation mode.
-        required: false
-        default: null
         choices: ['static', 'auto']
     addr_type:
         description:
             - Specifies the peer IP address type.
-        required: false
-        default: null
         choices: ['ipv4']
     out_if_name:
         description:
             - Specifies the type and number of the interface bound to the BFD session.
-        required: false
-        default: null
     dest_addr:
         description:
             - Specifies the peer IP address bound to the BFD session.
-        required: false
-        default: null
     src_addr:
         description:
             - Indicates the source IP address carried in BFD packets.
-        required: false
-        default: null
     vrf_name:
         description:
             - Specifies the name of a Virtual Private Network (VPN) instance that is bound to a BFD session.
               The value is a string of 1 to 31 case-sensitive characters, spaces not supported.
               When double quotation marks are used around the string, spaces are allowed in the string.
               The value _public_ is reserved and cannot be used as the VPN instance name.
-        required: false
-        default: null
     use_default_ip:
         description:
             - Indicates the default multicast IP address that is bound to a BFD session.
               By default, BFD uses the multicast IP address 224.0.0.184.
               You can set the multicast IP address by running the default-ip-address command.
               The value is a bool type.
-        required: false
-        default: false
+        type: bool
+        default: 'no'
     state:
         description:
             - Determines whether the config should be present or not on the device.
-        required: false
         default: present
         choices: ['present', 'absent']
 """