Grafana: Replace magic number with a constant variable in response status (#80132)

* Chore: Replace response status with const var

* Apply suggestions from code review

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

* Add net/http import

---------

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

pkg/middleware/auth.go

@@ -56,7 +56,7 @@ func notAuthorized(c *contextmodel.ReqContext) {
 
 func tokenRevoked(c *contextmodel.ReqContext, err *auth.TokenRevokedError) {
 	if c.IsApiRequest() {
-		c.JSON(401, map[string]any{
+		c.JSON(http.StatusUnauthorized, map[string]any{
 			"message": "Token revoked",
 			"error": map[string]any{
 				"id":                    "ERR_TOKEN_REVOKED",

pkg/middleware/recovery.go

@@ -170,9 +170,9 @@ func Recovery(cfg *setting.Cfg, license licensing.Licensing) web.Middleware {
 							resp["error"] = data.Title
 						}
 
-						ctx.JSON(500, resp)
+						ctx.JSON(http.StatusInternalServerError, resp)
 					} else {
-						ctx.HTML(500, cfg.ErrTemplateName, data)
+						ctx.HTML(http.StatusInternalServerError, cfg.ErrTemplateName, data)
 					}
 				}
 			}()