GH-41993 [Go] IPC writer shift voffsets when offsets array does not start from zero

[joellubi]

Rationale for this change

It should be valid to specify offset buffers that do not start from zero. This particularly important for when multiple arrays share a single value buffer.

What changes are included in this PR?

• Add condition to shift offsets buffer when it does not start from zero
• Test to reproduce failure and then validate fix

Are these changes tested?

Yes

Are there any user-facing changes?

Variable-length binary arrays that share a value buffer will not result in errors.

• GitHub Issue: [Go] [arrow/ipc/writer] voffsets are not updated when Binary-like arrays get truncated #41993

[github-actions]

⚠️ GitHub issue #41993 has been automatically assigned in GitHub to PR creator.

[joellubi]

Sorry just noticed a bug, will fix and reopen shortly

[joellubi]

Sorry just noticed a bug, will fix and reopen shortly

Fix in place, should be good now

[zeroshade]

@notfilippo can you give this a try with your example and confirm that this fixes the issue?

[notfilippo]

Thanks for the ping. I'll check my internal repro with this new version and let you know asap!

[notfilippo]

Tested with an internal repro. It works! Thanks @joellubi :)

[conbench-apache-arrow]

After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 1fce293.

There were no benchmark performance regressions. 🎉

The full Conbench report has more details. It also includes information about 1 possible false positive for unstable benchmarks that are known to sometimes produce them.