feat(backend): add configurable S3 path style support

[ntny]

Description of your changes:
Resolve: #10814

This MR introduces the ability to configure the S3 path style
Currently it is hardcoded here as pathStyle
'PathStyle' will be the default setting

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[google-oss-prow]

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[google-oss-prow]

Hi @ntny. Thanks for your PR.

I'm waiting for a kubeflow member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[hbelmiro]

/ok-to-test
/rerun-all

[ntny]

/rerun-all