packages: Move ctf-tools to ctf

Remove the ctf-tools package. Add a new package which contains the
previous contents of ctf-tools along with libctf. This removes
CDDL-licensed code from the utilities package.

Set LIB_PACKAGE for libctf so that DTrace runtime doesn't need to
install the tools.

MFC after: 1 day
Reviewed by: bapt
Sponsored by: https://www.patreon.com/bsdivy
Differential Revision: https://reviews.freebsd.org/D52776