Please archive engagement-list and las-gnome lists and others

Requested details

1. The list name

engagement-list edsearch las-gnome appsummit engagement-private

2. The rationale on why the mailing list should be archived (i.e project unmaintained)

There has been no activity and we have long agreed to switch to using discourse so these mailing lists are no longer being used. Plus I'm sick of the bounce messages.

3. Whether the list should be aliased to a specific other mailing list address

No, burn it with fire!

Additional information

Please remember we only remove the list information, subscriptions and NOT the archives themselves which are kept around for historical reasons.

/cc @averi