[Passes] Reenable the relative lookup table converter pass for ELF and COFF on aarch64

The bug (PR50227, affecting COFF) that caused the revert in
6f5670a4 has been fixed in
382c505d now, so it should be safe
to reenable the pass for that target (and ELF).

In PR50227 it's also mentioned that the same pass seems to cause
problems on aarch64 on darwin, so leaving it disabled there for now.