ci: lcitool: Maintain project package deps lists here

Each respective project that lcitool knows about and currently
maintains its list of package dependencies knows best what packages
they actually depend on. If a new dependency is currently needed,
first a change in lcitool is necessary before GitLab jobs and
containers can be updated. Provided a mapping already exists in
lcitool (which can quickly be added as an override via mappings.yml
temporarily) we speed up the whole CI update process by one step.

Note that starting this commit lcitool must be invoked as
    '$ lcitool -d/--data-dir ci/lcitool ...'
to pick up the project dependency list correctly.

Signed-off-by: Erik Skultety <eskultet@redhat.com>

ci/lcitool/projects/libvirt-csharp.yml

+---
+packages:
+  - mono
+  - monodevelop