Double GraalVM compatibility effort

[gsmet]

The idea is to try to support both GraalVM 19.2.1 and GraalVM 19.3.0.2 (we will upgrade to 19.3.1).

• Create an internal CI job with GraalVM branch https://github.com/oracle/graal/tree/release/graal-vm/19.3 in JDK 11 mode to test Quarkus master (@geoand) -> create proper issues as @gwenneg doesn't have access to it
• Fix the LocalizationFeature incompatibility (@gwenneg)
• Go back to 19.2.1 as the default image (@gwenneg)
• Figure out the JNI situation: forced to enabled for 19.3.1 only (@gwenneg)
• See if current master works with 19.2.1 or if we need to condition some added substitutions (@gwenneg)
• Which graal-sdk version should we use? Does both 19.2.1 and 19.3.0 work with the same version?
• Adjust documentation and website

[geoand]

Now that 19.3.1 is released, we should just rely on it for CI I think and not on the 19.3 branch

[gwenneg]

I can take care of this update as part of the double compatibility final PR which will be submitted tonight.

Unless there's a last minute issue, Quarkus 1.2 will use the GraalVM SDK from 19.2.1 and support native image generation from both GraalVM 19.2.1 and 19.3.1.

[gwenneg]

I forgot we need @cescoffier for the Docker image generation :)

@cescoffier could you please create ubi-quarkus-native-image:19.3.1-java8 and ubi-quarkus-native-image:19.3.1-java11?

[cescoffier]

@gwenneg push to quay in progress.
See https://github.com/quarkusio/quarkus-images/commit/e391ec4a39b92854419a4e14e2f7ea3ba510738a/checks?check_suite_id=401920973

[geoand]

Things are looking good I think, thanks a lot folks

[geoand]

The latest PR is #6574, correct?

[gwenneg]

@cescoffier Thanks for the push!

@geoand Yes, #6574 is the only PR that is meant to be merged. All other PRs were opened for testing purpose only and most of them have already been closed.