Fix returning newly instantiated arrays

[rafael226]

Fixes #66.

This changes code generation for return new <primitive>[size] so it emits the newly-created array as a local temporary and returns that temporary, matching the workaround pattern that already compiled.

What changed:

• handle I_NEWARRAY under Return without throwing CodeGenException
• add primitive newarray descriptor mapping for local array declarations
• update primitive direct-array-return codegen tests from expected exception to expected OpenCL
• unignore the existing runtime regression test

Validated locally with:

mvn -q -Djacoco.skip=true -Dtest='ReturnInstantiatedArrayDirectlyTest,Return*ArrayNewTest,Return*ArrayVarTest' test

Local note: the project POM contains -XX:MaxPermSize=512m, which JDK 17 rejects, so I removed that flag only for the local validation run and restored pom.xml afterward.

[rafael226]

Expanded the fix to cover direct returns for all primitive array types, including boolean. The implementation now derives the emitted return-array type from the method return type and the tests share a common expected-OpenCL helper to keep coverage consistent.