GH-44831: [CI] Build Java for integration tests from arrow-java

[lidavidm]

Rationale for this change

We moved java/ in apache/arrow to apache/arrow-java. We should use apache/arrow-java to integration tests.

What changes are included in this PR?

• Remove java/
• Use apache/arrow-java for integration test

Are these changes tested?

Yes.

Are there any user-facing changes?

No.

• GitHub Issue: [Java] Remove java/ #44945
• GitHub Issue: [Java][CI] Use apache/arrow-java for integration test #44831

[lidavidm]

We can't actually merge this until we finish deleting the rest of the existing Java code here.

[lidavidm]

It seems integration works...

[lidavidm]

We...may not want to merge this as-is, but it passes tests!

[lidavidm]

Updated, I think the macOS issue is not related.

[kou]

+1

[conbench-apache-arrow]

After merging your PR, Conbench analyzed the 3 benchmarking runs that have been run so far on merge-commit 8ac434f.

There were 132 benchmark results with an error:

• Commit Run on arm64-t4g-2xlarge-linux at 2024-12-05 09:34:16Z
  • tpch (R) with engine=arrow, format=parquet, language=R, memory_map=False, query_id=TPCH-07, scale_factor=1
  • tpch (R) with engine=arrow, format=native, language=R, memory_map=False, query_id=TPCH-09, scale_factor=1
• and 130 more (see the report linked below)

There were no benchmark performance regressions. 🎉

The full Conbench report has more details. It also includes information about 2 possible false positives for unstable benchmarks that are known to sometimes produce them.