GH-48610: [Ruby] Add FixedSizeListArray glue

[stenlarsson]

Rationale for this change

When testing ListSliceOptions I noticed that some glue were missing from the Ruby code.

What changes are included in this PR?

This adds the FixedSizeListArrayBuilder.build method in Ruby.

Are these changes tested?

Yes.

Are there any user-facing changes?

This makes it easier to create FixedSizeListArray objects in Ruby.

• GitHub Issue: [Ruby] Cannot create FixedSizeListArray objects directly #48610

[github-actions]

Thanks for opening a pull request!

If this is not a minor PR. Could you open an issue for this pull request on GitHub? https://github.com/apache/arrow/issues/new/choose

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Then could you also rename the pull request title in the following format?

GH-${GITHUB_ISSUE_ID}: [${COMPONENT}] ${SUMMARY}

or

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See also:

• Other pull requests
• Contribution Guidelines - Contributing Overview

[github-actions]

⚠️ GitHub issue #48610 has been automatically assigned in GitHub to PR creator.

[kou]

+1

[conbench-apache-arrow]

After merging your PR, Conbench analyzed the 3 benchmarking runs that have been run so far on merge-commit 3049131.

There were no benchmark performance regressions. 🎉

The full Conbench report has more details. It also includes information about 8 possible false positives for unstable benchmarks that are known to sometimes produce them.