Chore: pass url parameters through context.Context (#38826)

* pass url parameters through context.Context

* fix url param names without colon prefix

* change context params to vars

* replace url vars in tests using new api

* rename vars to params

* add some comments

* rename seturlvars to seturlparams

pkg/api/org.go

@@ -10,6 +10,7 @@ import (
 	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/setting"
 	"github.com/grafana/grafana/pkg/util"
+	macaron "gopkg.in/macaron.v1"
 )
 
 // GET /api/org
@@ -24,7 +25,7 @@ func GetOrgByID(c *models.ReqContext) response.Response {
 
 // Get /api/orgs/name/:name
 func (hs *HTTPServer) GetOrgByName(c *models.ReqContext) response.Response {
-	org, err := hs.SQLStore.GetOrgByName(c.Params(":name"))
+	org, err := hs.SQLStore.GetOrgByName(macaron.Params(c.Req)[":name"])
 	if err != nil {
 		if errors.Is(err, models.ErrOrgNotFound) {
 			return response.Error(404, "Organization not found", err)