[Java][CI] Add a test job on s390x

[asfimport]

Reporter: Kazuaki Ishizaki / @kiszk
Assignee: Kazuaki Ishizaki / @kiszk

PRs and other links:

• GitHub Pull Request #7938

_{Note: This issue was originally created as ARROW-9701. Please see the migration documentation for further details.}

[asfimport]

Kouhei Sutou / @kou:
Issue resolved by pull request 7938
#7938