Build: Print failed test summary after suite completes

[ebyhr]

https://github.com/apache/iceberg/actions/runs/26280375822/job/77354779601

We can't quickly identify TestADLSOutputStream without scrolling or searching by keyword.

This change will print the names of failed tests after the suite completes, as shown below:

...
TestPropertiesSerDesUtil > testPropertiesSerDes() PASSED

TestExceptionCode > testExceptionCode() STARTED

TestExceptionCode > testExceptionCode() PASSED

Failures:
  org.apache.iceberg.dell.ecs.TestEcsCatalog.testListTablesAndNamespaces()

25 tests completed, 1 failed

> Task :iceberg-dell:test FAILED

[Incubating] Problems report is available at: file:///Users/yuya.ebihara/iceberg/build/reports/problems/problems-report.html

[github-actions]

This pull request has been marked as stale due to 30 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time and @mention a reviewer or discuss it on the dev@iceberg.apache.org list. Thank you for your contributions.

[singhpk234]

Nice addition @ebyhr !

[ebyhr]

@singhpk234 Can we merge this PR?

[github-actions]

This pull request has been marked as stale due to 30 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time and @mention a reviewer or discuss it on the dev@iceberg.apache.org list. Thank you for your contributions.