GlobalMemoizedEffect

Note, this should only be called when assigning the result to a global value. If not, the global cache ref will not be the same, and this does nothing.

--- good --- val res: UIO[Int] = GlobalMemoizedEffect.cacheVal { Random.nextInt }

--- bad --- def res: UIO[Int] = GlobalMemoizedEffect.cacheVal { Random.nextInt }

--- bad --- val res: UIO[Int] = for { _ <- ZIO.logInfo("logging") res <- GlobalMemoizedEffect.cacheVal { Random.nextInt } } yield res