migrate bootstrap logic directly to websockets (#18855)

improve performance for startup sequences by 2x for 300+ nodes.

cmd/format-erasure.go

@@ -822,9 +822,6 @@ func initFormatErasure(ctx context.Context, storageDisks []StorageAPI, setCount,
 		}
 	}
 
-	// Mark all root disks down
-	markRootDisksAsDown(storageDisks, sErrs)
-
 	// Save formats `format.json` across all disks.
 	if err := saveFormatErasureAll(ctx, storageDisks, formats); err != nil {
 		return nil, err