Exception in code generation on Java 22 - NoSuchMethodError: void sun.misc.Unsafe.ensureClassInitialized

I created a minimal Gradle project to demonstrate the issue. https://github.com/edward3h/pkl-java22-unsafe

When using the pkl code generator in Gradle, on Java 22, I get an exception where this is the root cause:

```
Caused by: java.lang.ExceptionInInitializerError: Exception java.lang.NoSuchMethodError: 'void sun.misc.Unsafe.ensureClassInitialized(java.lang.Class)' [in thread "Execution worker Thread 2"]
at org.pkl.thirdparty.truffle.api.library.LibraryFactory.ensureLibraryInitialized(LibraryFactory.java:384)
at org.pkl.thirdparty.truffle.api.library.LibraryFactory.getUncached(LibraryFactory.java:364)
at org.pkl.thirdparty.truffle.api.library.LibraryFactory.(LibraryFactory.java:210)
at org.pkl.thirdparty.truffle.api.interop.InteropLibraryGen.(InteropLibraryGen.java:178)
at org.pkl.thirdparty.truffle.api.interop.InteropLibraryGen.(InteropLibraryGen.java:169)
at org.pkl.thirdparty.truffle.api.library.LibraryFactory.loadGeneratedClass(LibraryFactory.java:791)
at org.pkl.thirdparty.truffle.api.library.LibraryFactory.resolveImpl(LibraryFactory.java:740)
at org.pkl.thirdparty.truffle.api.library.LibraryFactory.resolve(LibraryFactory.java:733)
at org.pkl.thirdparty.truffle.api.interop.InteropLibrary.(InteropLibrary.java:2941)
at org.pkl.thirdparty.truffle.polyglot.PolyglotValueDispatch.(PolyglotValueDispatch.java:170)
at org.pkl.thirdparty.truffle.polyglot.PolyglotImpl.initialize(PolyglotImpl.java:166)
at org.pkl.thirdparty.graalvm.polyglot.impl.AbstractPolyglotImpl.setConstructors(AbstractPolyglotImpl.java:288)
at org.pkl.thirdparty.graalvm.polyglot.Engine$1.loadAndValidateProviders(Engine.java:1107)
at org.pkl.thirdparty.graalvm.polyglot.Engine$1.run(Engine.java:1067)
at org.pkl.thirdparty.graalvm.polyglot.Engine$1.run(Engine.java:1061)
at org.pkl.thirdparty.graalvm.polyglot.Engine.initEngineImpl(Engine.java:1061)
at org.pkl.thirdparty.graalvm.polyglot.Engine$ImplHolder.(Engine.java:143)
at org.pkl.thirdparty.graalvm.polyglot.Engine.getImpl(Engine.java:367)
at org.pkl.thirdparty.graalvm.polyglot.Engine$Builder.build(Engine.java:665)
at org.pkl.core.runtime.VmUtils.(VmUtils.java:74)
```

My projects work ok on Java 21.

Start with the linked minimal Gradle project and reproduce the failure on Java 22, comparing with Java 21. Trace the reported call through org.pkl.thirdparty.truffle.api.library.LibraryFactory and the Pkl code-generation path; done means generation succeeds on Java 22 without regressing Java 21.

Written by the indexing model from the issue text.