infra: verify RPM / Deb repositories, packages and tarballs

Tarantool version: 2.7.0-30-g62dffc7eb.

We have infrastructure for delivering RPM / Deb packages to users. However it is not verified at all. We should regularly verify the following points:

• A repository can be enabled successfully using the instructions on our website.
• After enabling of the repository a package can be successfully installed.
• Source tarballs for tarantool are downloadable via download.tarantool.org.
• The listing of the source tarballs is available on download.tarantool.org.

The repositories are determined by the following matrix:

• Tarantool release series: 1.10, 2.1, 2.2, etc.
• The repository type: live / release.
• Linux distribution + the distribution version: Debian (8, 9, 10), Ubuntu (...), CentOS (6, 7, 8), Fedora (...).

The packages are:

• Tarantool itself.
• Modules and connectors (see some minimal list in #5265).

Related: TNT-53.

Start by reviewing the repository instructions at https://tarantool.io/en/download/, the minimal module list in #5265, and the related TNT-53 work. Define coverage for each release, repository type, distribution, and package before implementing recurring checks; done means repository enablement, package installation, and source-tarball download and listing are verified.