Fix visibility of swap_hash_join to be pub

[alamb]

Which issue does this PR close?

• Closes swap_hash_join is no longer public so comet doesn't compile #13898
• Fix a regression in visibility introduced in Minor: change visibility of hash join utils #13893

Rationale for this change

swap_hash_join used to be pub and now it is pub(crate) which means other downstream crates can't use it

What changes are included in this PR?

Restore swap_hash_join to be pub

Are these changes tested?

Are there any user-facing changes?

[alamb]

Thanks for the review @Omega359 -- this PR now needs another commiter to approve before i can merge it 😭

[alamb]

Thanks @andygrove 🙏

[ozankabak]

Thanks for the fast fix @alamb and sorry for the inconvenience

[berkaysynnada]

Sorry for the inconvenience, I probably tried to set the all functions at the same visibility.

[alamb]

Sorry for the inconvenience, I probably tried to set the all functions at the same visibility.

No worries - it was easily fixed. Thanks for driving things forward