Previews: datasource permissions (#52747)

* Previews: datasource permissions

* lint

* simplify - force non-null `ds_uids`

* add `canBeDisabled` to search service

* add `IncludeThumbnailsWithEmptyDsUids`

* remove force refresh migration

* refactor main preview service

* add safeguard

* revert ticker interval

* update testdata

* fix test

* add mock search service

* add datasources lookup test

* update migration

* extract ds lookup to its own package to avoid cyclic imports

* lint

* fix dashbaord extract, use the real datasource lookup in tests. IS IT BULLETPROOF YET?!

* fix dashbaord extract, use the real datasource lookup in tests. IS IT BULLETPROOF YET?!

* remove stale log

* consistent casing

* pass context to `createServiceAccount`

* filter out the special grafana ds

pkg/models/dashboard_thumbs.go

@@ -86,6 +86,7 @@ type DashboardThumbnail struct {
 	Image            []byte         `json:"image"`
 	MimeType         string         `json:"mimeType"`
 	Updated          time.Time      `json:"updated"`
+	DsUIDs           string         `json:"-" xorm:"ds_uids"`
 }
 
 //
@@ -123,6 +124,7 @@ type FindDashboardThumbnailCountCommand struct {
 
 type FindDashboardsWithStaleThumbnailsCommand struct {
 	IncludeManuallyUploadedThumbnails bool
+	IncludeThumbnailsWithEmptyDsUIDs  bool
 	Theme                             Theme
 	Kind                              ThumbnailKind
 	Result                            []*DashboardWithStaleThumbnail
@@ -133,6 +135,7 @@ type SaveDashboardThumbnailCommand struct {
 	DashboardVersion int
 	Image            []byte
 	MimeType         string
+	DatasourceUIDs   []string
 
 	Result *DashboardThumbnail
 }