Revert r322327, r322352, r322358:

Disconnect the dependency on the kernel package from the runtime
package. There are a number of problems here:

1. The runtime package installed into a chroot or a jail would include the kernel package, changing the behavior of how jails work now [1];
2. As result of (1), it is possible a binary may incorrectly resolve kernel symbols [2]; in addition, it is possible there will be unexpected fallout with 32-bit jails on a 64-bit host kernel [2].

Noticed by: brd [1]
Discussed with: kib [2]
MFC after: 3 days
MFC note: record-only to wipe from the merge tracker
Sponsored by: The FreeBSD Foundation