Playlist: Move to generated api client (#103083)

* create playlist api client

* add more api client methods

* integrate new client. TODO: tests, integrate remaining util functions

* add error handling

* fix unit tests

* refactor to remove PlaylistUI type

* cleaner PlaylistStartPage

* handle generateName

* Fix startmodal name

* create generic error handling util

* prettier

* keep migration code for now

* better syntax

pkg/tests/apis/openapi_test.go

@@ -84,6 +84,9 @@ func TestIntegrationOpenAPIs(t *testing.T) {
 	}, {
 		Group:   "advisor.grafana.app",
 		Version: "v0alpha1",
+	}, {
+		Group:   "playlist.grafana.app",
+		Version: "v0alpha1",
 	}}
 	for _, gv := range groups {
 		VerifyOpenAPISnapshots(t, dir, gv, h)