Test project on GitHub Actions

[krlmlr]

Run the install-* script, fail test if script fails.

• One single project, e.g., RMariaDB
• All projects in a static matrix, see https://docs.github.com/en/actions/using-jobs/using-a-matrix-for-your-jobs
• All projects in a matrix, see https://www.cynkra.com/blog/2020-12-23-dynamic-gha/

[krlmlr]

@Antonov548: I have tweaked the description and broken it down to finer steps.

[krlmlr]

Would you like to try the dynamic build matrix? There's no rush.

[Antonov548]

Would you like to try the dynamic build matrix? There's no rush.

I have read the topic, before doing it, but still decided to start from static matrix. Looks interesting. I will try this out.