move coeff setting and type map from init to coeff

[BBBuZHIDAO]

FIX：write_data command throws an error

Reason：write_data and run will initialize lmp instance. But map_type will update local. When initialize the map_type once, the items in this map were already mapping to elements in potential file.

Solution: Sure we could set a flag to make the map_type just update once or non-local. But check the code in other potentials, the coeff setting and type mapping are in coeff function. So I think the better solution is move it. init function should only initialize the neighbor list.

more GDB debug details here: input file: in.lammps.txt error: NEP_CPU.log fixed: NEP_CPU.fix.log

[BBBuZHIDAO]

init form write_data init from run