journald log driver: use CONTAINER_ID field for container id
journald log driver: use CONTAINER_ID field for container id

This patch modifies the journald log driver to store the container ID in
a field named CONTAINER_ID, rather than (ab)using the MESSAGE_ID field.
Additionally, this adds the CONTAINER_ID_FULL field containing the
complete container ID and CONTAINER_NAME, containing the container name.

When using the journald log driver, this permits you to see log messages
from a particular container like this:

    # journalctl CONTAINER_ID=a9238443e193

Example output from "journalctl -o verbose" includes the following:

    CONTAINER_ID=27aae7361e67
    CONTAINER_ID_FULL=27aae7361e67e2b4d3864280acd2b80e78daf8ec73786d8b68f3afeeaabbd4c4
    CONTAINER_NAME=web

Closes: #12864
Signed-off-by: Lars Kellogg-Stedman <3318dc5ce3e4fb7c28a0b841b6801c884e1d0896@redhat.com>

redpanda/cli,Zebrilee/cli,dnephin/cli,thaJeztah/cli,ashfall/cli,allencloud/cli,dnephin/cli,e11137/cli,thaJeztah/cli,e11137/cli,docker/cli,riyazdf/cli,redpanda/cli,riyazdf/cli,cpuguy83/cli,docker/cli,allencloud/cli,Zebrilee/cli,ashfall/cli,cpuguy83/cli