LU-9859 libcfs: remove linux-curproc.c

LU-9859 libcfs: remove linux-curproc.c

The only real functionality remaining here is
cfs_curproc_cap_pack(),
and it can be trivially implemented as an inline
in curproc.h.
So do that and remove the file.

The rest can be moved to jobid.c

Linux-commit: 37d3b407dc14a13ec8bba3a4d7737c92f996e9c0

Lustre-change: https://review.whamcloud.com/41938
Lustre-commit: f6cd6a880cd03fd1d3fd3d8e03133f0835ad275d

Change-Id: I3546841fa44accb19d0867099c17b16ede48228e
Signed-off-by: Mr. NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/51742
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>