[MINSTALL-164] - Create GitHub Actions

[bmarwell]

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[cstamas]

Pls merge

[cstamas]

Pls pls merge

[aheritier]

not sure why it is useful in comparison of the official build env but why not ...

[cstamas]

@aheritier ASF Jenkins is still the "source of truth", OTOH GH Actions:

• gives amazingly fast builds (well, off US office hours at least)
• gives feedback about "full build" here, on this very page (makes easier to spot what to review what not)
• has up to date Java versions (Jenkins lags), has macOS builds (Jenkins has not)

All in all, is great help for reviewers but also for PR submitter....

(all this IF action covers ITs etc... as many maven projects does not run ITs in GH action yet, about to clean up)

[bmarwell]

@cstamas done.

Do we want to update the JDKs?
Do you need additional JDKs (like OpenJ9)?

[slawekjaranowski]

And I see it is another way for GA ... here be using build in containers ...

[cstamas]

Cool, thanks!

@slawekjaranowski @bmarwell am fine, I really just wanted to have ITs run here as well.
But we started a discussion on ML to do this for all reposes (or shared? am not into GAs too much)... that would be great to implement....