concat::tests::test_string_dictionary_merge failure fails on Mac / has different results in different platforms

[doki23]

Describe the bug

I ran test_string_dictionary_merge both in linux x86_64 and macos aarch64 platforms and got different results. It succeeded in linux x86_64 whose values' len is 33 and failed in macos aarch64 whose values' len is 32. It's because interner.intern produces different results when build interleave indices for new values array.

To Reproduce

Run cargo test both in above 2 platforms.

Expected behavior

The test can successfully pass in both platforms.

[tustvold]

I think this may be expected, as the interning is best effort

[doki23]

Yes, it's expected, but the test will failed. Maybe we should introduce conditional compilation in this test?

[tustvold]

label_issue.py automatically added labels {'arrow'} from #5461