GH-47904: [C++] [Python] Allow S3 Filesystem Re-initialization #47903
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Rationale for this change
This would allow Arrow to coexist with other libraries that also use the AWS SDK. Internally since 2 years ago AWS SDK already has a refcount mechanism for
InitAPIand supports re-init after deinit.This change improves the flexibility and safety of the S3 client lifecycle management.
What changes are included in this PR?
S3FS init changes
Are these changes tested?
Tested with our local infra. I can add a unit test in a dedicated cpp file (due to init/deinit usage) if wanted.
Are there any user-facing changes?
No
This PR includes breaking changes to public APIs. (If there are any breaking changes to public APIs, please explain which changes are breaking. If not, you can remove this.)
This PR contains a "Critical Fix". (If the changes fix either (a) a security vulnerability, (b) a bug that caused incorrect or invalid data to be produced, or (c) a bug that causes a crash (even when the API contract is upheld), please provide explanation. If not, you can remove this.)