Build or use GraalVM image with `native_image` in CI pipeline

If https://github.com/graalvm/container/pull/2 will be merged soon, we could use that image otherwise we have to build our own.

changed milestone to %0.5.0

added Theodolite Kotlin To Do modul/theodolite labels

mentioned in merge request !94 (merged)

mentioned in issue #170 (closed)

removed milestone %0.5.0

mentioned in merge request !157 (merged)

closed with merge request !157 (merged)

mentioned in commit 94aaf3ce

mentioned in merge request !160 (merged)

reopened

Instead of the image mentioned above, graalvm/native-image should now be used.

On our current master, we already use that image.

We keep this issue open, as we disabled the automatic native build due to the immense compilation time. We need to find a way for speeding up compiling.

Currently, building native images fails: #286.