fix: do not warn on valid known experiments (#18514)

Fixes https://github.com/coder/coder/issues/18024

* drive-by: renames `handleExperimentsSafe` to
`handleExperimentsAvailable` to better match semantics
* defines list of `codersdk.ExperimentsKnown` and updates
`ReadExperiments` to log on invalid experiments
* typescript-ignores `codersdk.Experiments` so apitypings generates a
valid enum list of possible values of experiment
* updates OverviewPageView to distinguish between known 'hidden'
experiments and unknown 'invalid' experiments

coderd/coderd.go

@@ -972,7 +972,7 @@ func New(options *Options) *API {
 		})
 		r.Route("/experiments", func(r chi.Router) {
 			r.Use(apiKeyMiddleware)
-			r.Get("/available", handleExperimentsSafe)
+			r.Get("/available", handleExperimentsAvailable)
 			r.Get("/", api.handleExperimentsGet)
 		})
 		r.Get("/updatecheck", api.updateCheck)
@@ -1895,7 +1895,9 @@ func ReadExperiments(log slog.Logger, raw []string) codersdk.Experiments {
 			exps = append(exps, codersdk.ExperimentsSafe...)
 		default:
 			ex := codersdk.Experiment(strings.ToLower(v))
-			if !slice.Contains(codersdk.ExperimentsSafe, ex) {
+			if !slice.Contains(codersdk.ExperimentsKnown, ex) {
+				log.Warn(context.Background(), "ignoring unknown experiment", slog.F("experiment", ex))
+			} else if !slice.Contains(codersdk.ExperimentsSafe, ex) {
 				log.Warn(context.Background(), "🐉 HERE BE DRAGONS: opting into hidden experiment", slog.F("experiment", ex))
 			}
 			exps = append(exps, ex)

coderd/experiments.go

@@ -26,7 +26,7 @@ func (api *API) handleExperimentsGet(rw http.ResponseWriter, r *http.Request) {
 // @Tags General
 // @Success 200 {array} codersdk.Experiment
 // @Router /experiments/available [get]
-func handleExperimentsSafe(rw http.ResponseWriter, r *http.Request) {
+func handleExperimentsAvailable(rw http.ResponseWriter, r *http.Request) {
 	ctx := r.Context()
 	httpapi.Write(ctx, rw, http.StatusOK, codersdk.AvailableExperiments{
 		Safe: codersdk.ExperimentsSafe,