Errors: Remove direct dependencies on github.com/pkg/errors (#64026)

Co-authored-by: Sofia Papagiannaki <1632407+papagian@users.noreply.github.com>

pkg/services/ngalert/api/util.go

@@ -3,6 +3,7 @@ package api
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"net/http"
@@ -11,7 +12,6 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/pkg/errors"
 	"gopkg.in/yaml.v3"
 
 	"github.com/grafana/grafana/pkg/api/response"
@@ -206,13 +206,15 @@ func messageExtractor(resp *response.NormalResponse) (interface{}, error) {
 // ErrorResp creates a response with a visible error
 func ErrResp(status int, err error, msg string, args ...interface{}) *response.NormalResponse {
 	if msg != "" {
-		err = errors.WithMessagef(err, msg, args...)
+		formattedMsg := fmt.Sprintf(msg, args...)
+		err = fmt.Errorf("%s: %w", formattedMsg, err)
 	}
 	return response.Error(status, err.Error(), err)
 }
 
 // accessForbiddenResp creates a response of forbidden access.
 func accessForbiddenResp() response.Response {
+	//nolint:stylecheck // Grandfathered capitalization of error.
 	return ErrResp(http.StatusForbidden, errors.New("Permission denied"), "")
 }