astra: switch to graalvm and source build

[GunniBusch]

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#276082

Change astra to building from source instead of using fat jar (which imho is already the main feature), and use graalvm as this is how source is officially build.

[GunniBusch]

@carlocab I reverted back to the passthrough all version. Feel free to mark it ready for review if you agree. (we can always change it back to any version)