refactor(data/nat/basic): finish removing sub lemmas (#9601)
* Follow-up of #9544 to remove the remaining sub lemmas on `nat` that can be generalized to `has_ordered_sub`.
* The renamings of the lemmas in mathlib that occurred at least once:
```
nat.sub_eq_of_eq_add -> sub_eq_of_eq_add_rev
nat.add_sub_sub_cancel -> add_sub_sub_cancel'
nat.sub_le_self -> sub_le_self'
```
