Add GraalVM as an JDK option

[Thihup]

[jochenchrist]

Great idea. I will add this option. However, I have not query much experience with GraalVM in production to give a valid recommendation. Please state your opinions here, so I can summarise a validated recommendation.

[JellyBrick]

GraalVM *

• Some compatibility issues (bugs in GraalVM)
• Cannot use ZGC or Shenandoah GC.

GraalVM Native-images

• Some compatibility issues with reflection
• Low memory footprint.
• Low throughput compared to Hotspot C2. (can be solved with PGO)

GraalVM CE

• It has a similar performance to Hotspot C2.
• High memory footprint compared to Hotspot C2.

GraalVM EE

• Contains some features compared to GraalVM CE.
• It has a much higher throughput than GraalVM CE.

[danthe1st]

I want to note that PGO on native-image is not available in GraalVM CE.