fix: use the correct parent ClassLoader on Quarkus

[greyhairredbear]

Note: This commit is a port of a fix by @triceo on TimefoldAI, see https://github.com/TimefoldAI/timefold-solver/pull/142/files

Checklist

• Documentation updated if applicable.
• Release notes updated if applicable.
• Upgrade recipe provided if applicable.

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[ge0ffrey]

Note that the fix on Timefold main was tested with different dependency versions and without the use of Drools classloaders.

[greyhairredbear]

Would it make sense to have the CI run to check for possible dependency issues? The workflows here need approval from a maintainer.

[mareknovotny]

ok to test

[greyhairredbear]

Jenkins retest this

[greyhairredbear]

Just updated this PR with the current changes from the main branch. Is there anything I can do to help this move forward? (@mareknovotny @lucamolteni)

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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[mareknovotny]

will wait for CI checks to complete and then we can merge if @lucamolteni doesn't object