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/storage/netapp/netapp_e_amg.py

@@ -34,22 +34,19 @@ options:
     syncIntervalMinutes:
         description:
             - The synchronization interval in minutes
-        required: no
         default: 10
     manualSync:
         description:
             - Setting this to true will cause other synchronization values to be ignored
-        required: no
-        default: no
+        type: bool
+        default: 'no'
     recoveryWarnThresholdMinutes:
         description:
             - Recovery point warning threshold (minutes). The user will be warned when the age of the last good failures point exceeds this value
-        required: no
         default: 20
     repoUtilizationWarnThreshold:
         description:
             - Recovery point warning threshold
-        required: no
         default: 80
     interfaceType:
         description:
@@ -57,17 +54,15 @@ options:
         choices:
             - iscsi
             - fibre
-        required: no
-        default: null
     syncWarnThresholdMinutes:
         description:
             - The threshold (in minutes) for notifying the user that periodic synchronization has taken too long to complete.
-        required: no
         default: 10
     state:
         description:
             - A C(state) of present will either create or update the async mirror group.
             - A C(state) of absent will remove the async mirror group.
+        choices: [ absent, present ]
         required: yes
 """