fix: remove inline GC and schedule a background task instead (#1610)

* fix: remove inline GC and set a default value of gc interval

- remove inline GC
- add a default value of GC interval
- run the GC periodically by default with the default value if no interval provided
- generate GC tasks with a random delay(0-30s) between
- add IsReady() method to scheduler.TaskGenerator interface

Signed-off-by: Andreea-Lupu <andreealupu1470@yahoo.com>

* ci: add test for gc with short interval

Signed-off-by: Andreea-Lupu <andreealupu1470@yahoo.com>

---------

Signed-off-by: Andreea-Lupu <andreealupu1470@yahoo.com>

pkg/debug/gqlplayground/gqlplayground.go

@@ -21,9 +21,8 @@ var playgroundHTML embed.FS
 
 // SetupGQLPlaygroundRoutes ...
 func SetupGQLPlaygroundRoutes(router *mux.Router,
-	storeController storage.StoreController, l log.Logger,
+	storeController storage.StoreController, log log.Logger,
 ) {
-	log := log.Logger{Logger: l.With().Caller().Timestamp().Logger()}
 	log.Info().Msg("setting up graphql playground route")
 
 	templ, err := template.ParseFS(playgroundHTML, "index.html.tmpl")