LU-9859 libcfs: rework special libcfs string handling

LU-9859 libcfs: rework special libcfs string handling

The header libcfs_string.h contains NID string specific items so
move them to the LNet header lib-types.h. Only functions for
string to or from mask handling is left in libcfs_string.c. We
can merged that into debug.c where it is first used.

Test-Parameters: trivial
Change-Id: I79c56594af065dfd08b8205a05326fa0ebf36d55
Signed-off-by: James Simmons <jsimmons@infradead.org>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/57944
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Timothy Day <timday@amazon.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>