fix(AWS DynamoDB Node): Fix issue pagination and simplify issue #4956 #4957 (#4959)

* Added 'M' type to decode attribute for dynamodb

* Fixed bug with return all. Headers from the previous iteration were being passed causing an invalid signature error

packages/nodes-base/nodes/Aws/DynamoDB/utils.ts

@@ -81,6 +81,8 @@ function decodeAttribute(type: AttributeValueType, attribute: string) {
 		case 'SS':
 		case 'NS':
 			return attribute;
+		case 'M':
+			return simplify(attribute);
 		default:
 			return null;
 	}