By default we skip package builds if run on a non-Keyman repo. This
makes it harder to test changes, so this PR allows to pass the parameter
`force: true` when triggering the build.
So far the GHA was called "Ubuntu packaging" but the status reported as
"Debian packaging" which was confusing. This change now uses "Ubuntu
packaging" in both places.
We still keep the filename `deb-packaging.yml` because we're packaging
the .deb format, and because it's shorter.
Fixes: #13497
