GH-44729: [C++][Acero] Enable nested types for non-keys fields in AsofJoin operation

[mroz45]

Rationale for this change

Add support for nested types

What changes are included in this PR?

Change unmnaterialized_table to use AppendArraySlice

Are these changes tested?

I added tests for case List, Fixed Size List and Struct

Are there any user-facing changes?

• GitHub Issue: [Acero] Not support type like Fixed Size List in asof join node #44729

[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

Opening GitHub issues ahead of time contributes to the Openness of the Apache Arrow project.

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

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

or

MINOR: [${COMPONENT}] ${SUMMARY}

In the case of PARQUET issues on JIRA the title also supports:

PARQUET-${JIRA_ISSUE_ID}: [${COMPONENT}] ${SUMMARY}

See also:

• Other pull requests
• Contribution Guidelines - Contributing Overview

[github-actions]

⚠️ GitHub issue #44729 has been automatically assigned in GitHub to PR creator.