Replace travis CI with GHA (#3913)

Replace travis CI with GHA (#3913)

* [githubactions] Use collectd-ci container to run tests

Uses containers for collectd provided by collectd/ci-docker [1]
Repeats what travis was using for building collectd

* checks out branch
* installs dependencies (already in containers)
* runs the script commands from travis (pkg-config, confgure, make)

[1] https://github.com/collectd/ci-docker

[githubactions] Add config flags to builds

* [githubactions] Add a job for experimental OSes

* [GHA] update actions for new distro containers in collectd/ci-docker

* Mark ``make check`` as optional for now

it is not passing reliably, and is being marked as optional until it is

Co-authored-by: BarometerExperimental <barometer-experimental@container>