ca-certificates: add missing dependency to openssl

openssl and openssl-misc are required for update-ca-certificates to work
correctly when c_rehash is enabled. Instead of having those in packageconfig,
add them here as rdepends.

Remove old ca-certificates recipe as upstream poky has a newer version.

Task-number: QTBUG-57641
Change-Id: I3c76f86ec52c193cedecc51c50805c897b8e03b6
Reviewed-by: Teemu Holappa <teemu.holappa@qt.io>
Reviewed-by: Kari Oikarinen <kari.oikarinen@qt.io>