Resurrect CI / CD and make it nice

[Totktonada]

Subtask of tarantool/tarantool#6056

There are several problems with CI / CD in vshard:

• It uses Travis CI, which going to be paid service (.org infrastructure will gone soon, .com has tight limits).
• CI on several Linux distros is red (I don't know exact reason).
• No package deployments to our new S3 infra (see Deploy package repos on MRG's S3 infra tarantool#3380, infra: deprecation plan for packagecloud tarantool#4947, modules: RPM / Deb deploy infrastructure for S3 based repositories tarantool#5494)

We also can improve our CI in the following areas:

• Verify vshard against different tarantool versions.
• Verify build packages across different OS.
• Run tests on Mac OS.
• Verify installation using a rockspec.

The plan is to implement CI / CD for vshard on top of the GitHub Actions infrastructure, resolve existing problems and make it a way more powerful.

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Estimated as 3 days work with the idea to reuse smtp's CI / CD code after resolving of the following tasks: tarantool/smtp#34, tarantool/smtp#35, tarantool/smtp#36.

[Totktonada]

I suggest to start from adopting fast_testing.yml from https://github.com/tarantool/tuple-keydef.

[Totktonada]

See also tarantool/smtp#42.