Fix Not Supported Java Version Bug

[dnestoro]

What does this PR do?

Fix Ci not supported Java version error.

[alvarosanchez]

It seems this is not that easy.

If this is later used for graalvm/setup-graalvm action, the valid combinations are:

• version: latest, java-version: 17` (should remove hardcoded 22.3.0 version and use latest)
• version: dev, java-version: dev` (see Allow java-version: 'dev' for GraalVM dev builds graalvm/setup-graalvm#31).

[linghengqian]

According to https://docs.gradle.org/current/release-notes.html#java19 , increasing the Gradle version used by the project to 7.6 is a requirement for JDK19 testing.

[dnestoro]

It seems this is not that easy.

If this is later used for graalvm/setup-graalvm action, the valid combinations are:

• version: latest, java-version: 17` (should remove hardcoded 22.3.0 version and use latest)
• version: dev, java-version: dev` (see graalvm/setup-graalvm#31).

I have to explore how to implement that. Thanks for the suggestion

[linghengqian]

• I think https://github.com/oracle/graalvm-reachability-metadata/blob/master/gradle/wrapper/gradle-wrapper.jar should be removed instead of keeping a copy of the old 7.4.1 binary in Git.

• We should also add **/gradle/wrapper/gradle-wrapper.jar entry in .gitignore and remove !gradle-wrapper.jar entry.

[linghengqian]

• According to https://github.com/oracle/graalvm-reachability-metadata/actions/runs/4016627730/jobs/6900250113 , it seems that when org.jetbrains.kotlin-kotlin-reflect-1.7.10 detects itself running on JDK19 , will automatically block tests, it seems that need add ＠Disabled annotations to all its unit tests temporarily? Cc @mhalbritter , the original committer of this unit test.

• https://github.com/oracle/graalvm-reachability-metadata/actions/runs/4016627730/jobs/6900237366 shows that org.eclipse.jetty-jetty-server-11.0.12 is calling the JDK19 Virtual Thread class, which it is so weird, I can't see the relevant operations in the unit test.

• It looks like we have to temporarily change the build.gradle plugin settings in https://github.com/oracle/graalvm-reachability-metadata/blob/master/tests/src/org.eclipse.jetty/jetty-server/11.0.12/build.gradle .

[fniephaus]

LGTM, thanks!

[dnestoro]

As discussed with @fniephaus we will disable JDK19 builds temporarily, to unblock CI. Builds will be enabled again, as soon as we define the best solution for the problem.

[linghengqian]

As discussed with @fniephaus we will disable JDK19 builds temporarily, to unblock CI. Builds will be enabled again, as soon as we define the best solution for the problem.

• Once this PR is merged, I can try to fix JDK 19 related unit tests in another PR. I have a PR addressing issues with Jetty Server, Jetty Client and Kotlin Reflect.