path is inconsistent when use non-English letters

[lzh-lab]

cortex-tools/pkg/client/rules.go

Lines 17 to 50 in bc1bc5c

	func (r *CortexClient) CreateRuleGroup(ctx context.Context, namespace string, rg rwrulefmt.RuleGroup) error {
	payload, err := yaml.Marshal(&rg)
	if err != nil {
	return err
	}
	escapedNamespace := url.PathEscape(namespace)
	path := r.apiPath + "/" + escapedNamespace
	res, err := r.doRequest(path, "POST", payload)
	if err != nil {
	return err
	}
	res.Body.Close()
	return nil
	}
	// DeleteRuleGroup creates a new rule group
	func (r *CortexClient) DeleteRuleGroup(ctx context.Context, namespace, groupName string) error {
	escapedNamespace := url.PathEscape(namespace)
	escapedGroupName := url.PathEscape(groupName)
	path := r.apiPath + "/" + escapedNamespace + "/" + escapedGroupName
	res, err := r.doRequest(path, "DELETE", nil)
	if err != nil {
	return err
	}
	res.Body.Close()
	return nil
	}

Delete use escaped group name and Create not.

[lzh-lab]

Example：

Create: http://host:port/api/v1/rules/metric/啊啊 => /api/v1/rules/metric/%E5%95%8A%E5%95%8A
Delete: http://host:port/api/v1/rules/metric/啊啊 => /api/v1/rules/metric/%25E5%2595%258A%25E5%2595%258A

url.PathEscape(啊啊) => %E5%95%8A%E5%95%8A
url.PathEscape(url.PathEscape(啊啊)) => %25E5%2595%258A%25E5%2595%258A