Deprecate old error signature

[olzraiti]

Errors signature are currently:

{
      	"statusCode": 422,
	"message": "userID cannot be updated by this method"
	"error": {
		"statusCode": 422,
		"name": "Error",
		"message": "UserID cannot be changed"
	}
}

We should remove the error part which is duplicate. Simple as removing usage of src/error-signature-backward-compatibility/error-signature-backward-compatibility.filter.ts