tools/delaytop: add memory verbose mode support

The original delaytop tool always displayed detailed memory subsystem
breakdown, which could be overwhelming for users who only need high-level
overview.

Add flexible display control allowing users to choose their preferred
information granularity.

The new flexibility provides:
1) For quick monitoring: use normal mode to reduce visual clutter
2) For deep analysis: use verbose mode to see all memory subsystem details

Link: https://lkml.kernel.org/r/202509070012527934u0ySb3teQ4gOYKnocyNO@zte.com.cn


Signed-off-by: Fan Yu <fan.yu9@zte.com.cn>
Reviewed-by: xu xin <xu.xin16@zte.com.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>