ospfd: Replace LSDB callbacks with LSA Update/Delete hooks.

ospfd: Replace LSDB callbacks with LSA Update/Delete hooks.

Replace the LSDB callbacks with LSA update and delete hooks using the
the FRR hook mechanism. Remove redundant callbacks by placing the LSA
update and delete hooks in a single place so that deletes don't need
to be handled by the update hook. Simplify existing OSPF TE and OSPF
API Server callbacks now that there is no ambiguity or redundancy.
Also cleanup the debugging by separating out opaque-lsa debugging
from the overloaded event debugging.

Signed-off-by: Acee Lindem <acee@lindem.com>