[AURON #2576] Support arrays_overlap natively

[Sigma-Ma]

Which issue does this PR close?

Closes #2576

Rationale for this change

Spark's arrays_overlap expression currently relies on expression fallback in Auron.

What changes are included in this PR?

• Convert ArraysOverlap through the existing extension-function path.
• Implement native overlap checks for supported atomic element types.
• Preserve Spark's null and empty-array behavior, NaN equality, and distinct signed zeros.
• Add Rust coverage for scalars, broadcasting, slices, empty batches, and invalid arguments.
• Add Spark compatibility tests that verify native execution and complex-element fallback.

Are there any user-facing changes?

Yes. arrays_overlap runs natively for supported atomic element types. Unsupported element types continue using Spark fallback.

How was this patch tested?

• ./dev/reformat --check.
• cargo test --profile pre --locked -p datafusion-ext-functions.
• ./build/mvn -Ppre -Pspark-3.5 -Pscala-2.12 \-pl spark-extension-shims-spark test -DskipBuildNative -Dsuites=org.apache.auron.AuronFunctionSuite.
• ./build/mvn -Ppre -Pspark-4.0 -Pscala-2.13 -pl spark-extension-shims-spark test -DskipBuildNative -Dsuites=org.apache.auron.AuronFunctionSuite.

Was this patch authored or co-authored using generative AI tooling?

• Yes
• No

Generated-by: OpenAI Codex (GPT-6)

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