maint: remove unnecessary inttostr usage in printf
* src/cksum.c (output_crc): Use '%ju' instead of umaxtostr.
* src/shred.c (dopass): Likewise.
* src/csplit.c (handle_line_error, regexp_error, close_output_file)
(parse_patterns): Use '%jd' instead of offtostr.
* src/tail.c (xlseek): Likewise.
* src/head.c (elseek): Likewise.
* src/group-list.c (gidtostr_ptr): Remove function.
(gidtostr): Remove macro.
(print_group): Use '%ju' instead of umaxtostr.
* src/id.c (gidtostr_ptr, uidtostr_ptr): Remove functions.
(gidtostr, uidtostr): Remove macros.
(print_user, print_full_info): Use '%ju' instead of umaxtostr.
* src/sort.c (specify_nmerge): Use '%u' instead of uinttostr.