Add option to run-time initialize JDK classes

[zakkak]

Description

Currently we can't test the flag -H:-InitializeJDKAtBuildTimeMigration that is planned to be introduced to GraalVM with oracle/graal#10531 because GraalVM internally registers classes for build-time or run-time registrations using the same mechanisms we do.

The idea behind the -H:-InitializeJDKAtBuildTimeMigration flag is that it will not register JDK classes for build-time initialization (which is what happens now), allowing them to be run-time initialized which is the default behavior for classes without explicit build time initialization strategy. However, in Quarkus registers everything for build-time initialization so we will need to explicitly register for run-time initialization any JDK classes no longer being registered for build time initialization when using -H:-InitializeJDKAtBuildTimeMigration.

Relates to #42682 which if implemented would possibly make this easier.

Implementation ideas

No response

[quarkus-bot]

/cc @Karm (native-image), @galderz (native-image)