Dependency on github.com/apache/arrow-go/v18/arrow/compute greatly increases binary size

### Feature Request / Improvement

We've noticed that including the compute package from arrow-go in our binary contributes ~7mb to the binary size.

At one point (bab83126b2bd5f42949b47b8299d1f28dac86e17) this package was pulled in only by the function `ToRequestedSchema` in arrow_utils.go, which was only used by tests. In newer versions, it appears this is now used in a few more places (arrow_scanner.go and writer.go).

It may not be possible to easily remove the dependency at this point, but just wanted to make you aware.

Start by tracing ToRequestedSchema in arrow_utils.go and its uses in arrow_scanner.go and writer.go. Measure the binary-size impact of the arrow/compute dependency and determine whether the dependency can be removed or isolated; done means preserving the affected behavior while reducing the reported binary-size increase.

Written by the indexing model from the issue text.