Provisioning: Show file path of provisioning file in save/delete dialogs (#16706)

* Add file path to metadata and show it in dialogs

* Make path relative to config directory

* Fix tests

* Add test for the relative path

* Refactor to use path relative to provisioner path

* Change return types

* Rename attribute

* Small fixes from review

pkg/models/dashboards.go

@@ -323,15 +323,13 @@ type GetDashboardSlugByIdQuery struct {
 	Result string
 }
 
-type IsDashboardProvisionedQuery struct {
+type GetProvisionedDashboardDataByIdQuery struct {
 	DashboardId int64
-
-	Result bool
+	Result      *DashboardProvisioning
 }
 
 type GetProvisionedDashboardDataQuery struct {
-	Name string
-
+	Name   string
 	Result []*DashboardProvisioning
 }