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/cloud/amazon/execute_lambda.py

@@ -44,48 +44,42 @@ options:
       - The name of the function to be invoked. This can only be used for
         invocations within the calling account. To invoke a function in another
         account, use I(function_arn) to specify the full ARN.
-    required: false
-    default: None
   function_arn:
     description:
       - The name of the function to be invoked
-    required: false
-    default: None
   tail_log:
     description:
-      - If C(tail_log=true), the result of the task will include the last 4 KB
+      - If C(tail_log=yes), the result of the task will include the last 4 KB
         of the CloudWatch log for the function execution. Log tailing only
-        works if you use synchronous invocation C(wait=true). This is usually
+        works if you use synchronous invocation C(wait=yes). This is usually
         used for development or testing Lambdas.
-    required: false
-    default: false
+    type: bool
+    default: 'no'
   wait:
     description:
-      - Whether to wait for the function results or not. If I(wait) is false,
+      - Whether to wait for the function results or not. If I(wait) is C(no),
         the task will not return any results. To wait for the Lambda function
-        to complete, set C(wait=true) and the result will be available in the
+        to complete, set C(wait=yes) and the result will be available in the
         I(output) key.
-    required: false
-    default: true
+    type: bool
+    default: 'yes'
   dry_run:
     description:
       - Do not *actually* invoke the function. A C(DryRun) call will check that
         the caller has permissions to call the function, especially for
         checking cross-account permissions.
-    required: false
-    default: False
+    type: bool
+    default: 'no'
   version_qualifier:
     description:
       - Which version/alias of the function to run. This defaults to the
         C(LATEST) revision, but can be set to any existing version or alias.
         See https;//docs.aws.amazon.com/lambda/latest/dg/versioning-aliases.html
         for details.
-    required: false
     default: LATEST
   payload:
     description:
       - A dictionary in any form to be provided as input to the Lambda function.
-    required: false
     default: {}
 '''