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/dellos9/dellos9_config.py

@@ -33,8 +33,6 @@ options:
         in the device running-config. Be sure to note the configuration
         command syntax as some commands are automatically modified by the
         device config parser. This argument is mutually exclusive with I(src).
-    required: false
-    default: null
     aliases: ['commands']
   parents:
     description:
@@ -42,8 +40,6 @@ options:
         the commands should be checked against.  If the parents argument
         is omitted, the commands are checked against the set of top
         level or global commands.
-    required: false
-    default: null
   src:
     description:
       - Specifies the source path to the file that contains the configuration
@@ -51,8 +47,6 @@ options:
         either be the full path on the Ansible control host or a relative
         path from the playbook or role root directory. This argument is
         mutually exclusive with I(lines).
-    required: false
-    default: null
   before:
     description:
       - The ordered set of commands to push on to the command stack if
@@ -60,16 +54,12 @@ options:
         the opportunity to perform configuration commands prior to pushing
         any changes without affecting how the set of commands are matched
         against the system.
-    required: false
-    default: null
   after:
     description:
       - The ordered set of commands to append to the end of the command
         stack if a change needs to be made.  Just like with I(before) this
         allows the playbook designer to append a set of commands to be
         executed after the command set.
-    required: false
-    default: null
   match:
     description:
       - Instructs the module on the way to perform the matching of
@@ -80,7 +70,6 @@ options:
         must be an equal match.  Finally, if match is set to I(none), the
         module will not attempt to compare the source configuration with
         the running configuration on the remote device.
-    required: false
     default: line
     choices: ['line', 'strict', 'exact', 'none']
   replace:
@@ -91,7 +80,6 @@ options:
         mode.  If the replace argument is set to I(block) then the entire
         command block is pushed to the device in configuration mode if any
         line is not correct.
-    required: false
     default: line
     choices: ['line', 'block']
   update:
@@ -103,7 +91,6 @@ options:
         device running configuration.  When you set this argument to I(check)
         the configuration updates are determined but not actually configured
         on the remote device.
-    required: false
     default: merge
     choices: ['merge', 'check']
   save:
@@ -111,9 +98,8 @@ options:
       - The C(save) argument instructs the module to save the running-
         config to the startup-config at the conclusion of the module
         running.  If check mode is specified, this argument is ignored.
-    required: false
+    type: bool
     default: no
-    choices: ['yes', 'no']
   config:
     description:
       - The module, by default, will connect to the remote device and
@@ -123,8 +109,6 @@ options:
         every task in a playbook.  The I(config) argument allows the
         implementer to pass in the configuration to use as the base
         config for comparison.
-    required: false
-    default: null
   backup:
     description:
       - This argument will cause the module to create a full backup of
@@ -132,9 +116,8 @@ options:
         changes are made.  The backup file is written to the C(backup)
         folder in the playbook root directory.  If the directory does not
         exist, it is created.
-    required: false
-    default: no
     type: bool
+    default: 'no'
 notes:
   - This module requires Dell OS9 version 9.10.0.1P13 or above.