ARROW-18392: [Python] Fix test_s3fs_wrong_region; set anonymous=True (#14716)
ARROW-18392: [Python] Fix test_s3fs_wrong_region; set anonymous=True (#14716)

Will fix [ARROW-18392](https://issues.apache.org/jira/browse/ARROW-18392)

Authored-by: Miles Granger <5f8a3a758c2a737f59347a2aaa87f2bf5c1f5e7b@gmail.com>
Signed-off-by: Antoine Pitrou <9359a4d812173b65a3a0094cd86363e79731a3c2@python.org>
apache/arrow,apache/arrow,kou/arrow,kou/arrow,apache/arrow,apache/arrow,kou/arrow,apache/arrow,apache/arrow,apache/arrow,kou/arrow,apache/arrow,kou/arrow,kou/arrow,apache/arrow,apache/arrow,kou/arrow,kou/arrow,kou/arrow,kou/arrow,apache/arrow,kou/arrow,kou/arrow,apache/arrow,kou/arrow,apache/arrow,kou/arrow,apache/arrow