Vdist

* Support for CentOS deprecated.
* Support for ArchLinux deprecated.
* Added support for Fedora (*fedora37* profile).
* Added *ubuntu-focal* profile.
* A RPM repository created at PackageCloud to host vdist releases.
* CI/CD migrated from Travis to GitHub Actions.

Now vdist packages for Arch Linux using their new zstd format.

Jinja2 buggy version dependency fixed. Many other bugs fixed.

As Bintray closed I'm migrating package repositories to artifactory but changes in Travis are no doing things easier to me.

- "archlinux" profile added. Now you can get your application into a .pkg.xz archlinux package that can be installed with pacman.
- Integration tests greatly refactored to make easier add further profiles.

- "ubuntu-trusty" profile is now deprecated. Included an "ubuntu-lts" instead. This
new profile will point to current Ubuntu Long Term Support version. Be aware that this
means that docker image used with this profile will change in the moment Ubuntu
team upload a new version tagged as LTS.
- Added a new profile "centos" that point to latest centos version. Be aware
that that docker image will change as happens with the one related to "ubunu-lts".
- "centos7" profile marked as deprecated. It will be removed soon.
- "centos6" profile is broken. I've not been able to make it work again so I've
removed it from available profiles. I'm going to keep centos6 related code for a
time just in case anyone find a way to fix it. As time passes that code will be
entirely removed.

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