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_vxlan_global.py

@@ -33,57 +33,40 @@ options:
         description:
             - Specifies a bridge domain ID.
               The value is an integer ranging from 1 to 16777215.
-        required: false
-        default: null
     tunnel_mode_vxlan:
         description:
             - Set the tunnel mode to VXLAN when configuring the VXLAN feature.
-        required: false
         choices: ['enable', 'disable']
-        default: null
     nvo3_prevent_loops:
         description:
             - Loop prevention of VXLAN traffic in non-enhanced mode.
               When the device works in non-enhanced mode,
               inter-card forwarding of VXLAN traffic may result in loops.
-        required: false
         choices: ['enable', 'disable']
-        default: null
     nvo3_acl_extend:
         description:
             - Enabling or disabling the VXLAN ACL extension function.
-        required: false
         choices: ['enable', 'disable']
-        default: null
     nvo3_gw_enhanced:
         description:
             - Configuring the Layer 3 VXLAN Gateway to Work in Non-loopback Mode.
-        required: false
         choices: ['l2', 'l3']
-        default: null
     nvo3_service_extend:
         description:
             - Enabling or disabling the VXLAN service extension function.
-        required: false
         choices: ['enable', 'disable']
-        default: null
     nvo3_eth_trunk_hash:
         description:
             - Eth-Trunk from load balancing VXLAN packets in optimized mode.
-        required: false
         choices: ['enable','disable']
-        default: null
     nvo3_ecmp_hash:
         description:
             - Load balancing of VXLAN packets through ECMP in optimized mode.
-        required: false
         choices: ['enable', 'disable']
-        default: null
     state:
         description:
             - Determines whether the config should be present or not
               on the device.
-        required: false
         default: present
         choices: ['present', 'absent']
 """