GH-41493: [C++][S3] Add a new option to check existence before CreateDir#41822

pitrou merged 3 commits intoapache:mainapache/arrow:mainfrom

HaochengLIU:41493-check-file-existence-before-creationHaochengLIU/arrow:41493-check-file-existence-before-creationCopy head branch name to clipboard