Refactor: Relate to PEXSI-related changes caused by refactor #4767

[Flying-dragon-boxing]

• [ ] Refactors related to HsolverLCAO See #4767 for details. Temporarily we can just add a pointer mark "*" and the program will run (fixes new issues in #4750), but eventually it seems that we will abandon pdiagh, so the problem remains.

• [x] PEXSI Driver version 2 introduce PPEXSIDFTDriver2 with better chemical potential $\mu$ guess, which drastically improves performance to get correct results, the pexsi_spin should always be set to 2