RBAC: Remove folder guardians part 1 (#104449)

* replace usage of folder guardians with access control evaluators

* remove NewByFolderUID guardian

* bring up to date

* fix test

* more test fixes, and don't fetch the folder before evaluating lib element access

* change what error is returned

* fix alerting test

* try to fix linter errors

* we don't assign general folder write permissions, reverting to the previous logic for general folders

pkg/services/libraryelements/libraryelements_patch_test.go

@@ -324,9 +324,10 @@ func TestIntegration_PatchLibraryElement(t *testing.T) {
 			resp := sc.service.createHandler(sc.reqContext)
 			var result = validateAndUnMarshalResponse(t, resp)
 			cmd := model.PatchLibraryElementCommand{
-				Name:    "Text - Library Panel",
-				Version: 1,
-				Kind:    int64(model.PanelElement),
+				Name:      "Text - Library Panel",
+				Version:   1,
+				Kind:      int64(model.PanelElement),
+				FolderUID: &sc.folder.UID,
 			}
 			sc.ctx.Req = web.SetURLParams(sc.ctx.Req, map[string]string{":uid": result.Result.UID})
 			sc.ctx.Req.Body = mockRequestBody(cmd)