fix(storage): credentials expires after 1 hour

[AllanZhengYP]

Description of changes

Supply credentials provider instead of resolved static credentials object to the S3 client. As a result, underlying S3 client can always access up-to-dated credentials. This solves the issue for credentials expiration in long-running processes like MPU

Issue #, if available

13307

Description of how you validated changes

• Manual validation

• Unit test

Checklist

• [x] PR description included
• [x] yarn test passes
• [x] Tests are changed or added
• [ ] Relevant documentation is changed or added (and PR referenced)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[ashika112]

Overall i am not against merging, but i think we should avoid type casting. Why are we casting it? We realized lotta issue because of type casts even in tests during gen2 work. Dont mind a separate followup