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]

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.

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[hbelmiro]

/ok-to-test
/rerun-all

[ntny]

/rerun-all

[HumairAK]

/lgtm
/approve

Thanks @ntny !

Can you also update the documentation here: https://github.com/kubeflow/website/blob/master/content/en/docs/components/pipelines/operator-guides/configure-object-store.md

Doesn't need to be elaborate, updating the examples to indicate this optional field exists is sufficient in my opinion.

[HumairAK]

/approve

[google-oss-prow]

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