[C++][CI] Revisit the flaky S3 tests caused by recent minio

[asfimport]

See change in https://github.com/apache/arrow/pull/6632/files#diff-01448dc0a0e3217fd1579b81a915d593R843

Reporter: Krisztian Szucs / @kszucs

_{Note: This issue was originally created as ARROW-8134. Please see the migration documentation for further details.}

[pitrou]

This was opened in 2020 and we're now testing with a Minio version from 2022, closing as outdated