Support obtain sts token from rustfs

[luoyuxia]

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• I searched in the issues and found nothing similar.

Description

Currently, obtain sts token from rustfs will throw exception which make it's impossible for user to use rustfs/minio.
see comments in
#2660 (comment)

We may change the api to obtain sts token, which works for s3 and rustfs.

See:
https://github.com/orgs/rustfs/discussions/1239

Willingness to contribute

• I'm willing to submit a PR!