[Matrix]: add a static I/O gen for FG SpMM.
[Matrix]: add a static I/O gen for FG SpMM.

This is for test only.

icoming/FlashX,icoming/FlashGraph,icoming/FlashX,flashxio/FlashX,icoming/FlashGraph,icoming/FlashGraph,icoming/FlashX,icoming/FlashGraph,flashxio/FlashX,flashxio/FlashX,icoming/FlashX,flashxio/FlashX,flashxio/FlashX,flashxio/FlashX,icoming/FlashGraph,icoming/FlashX