add a storage supported provider : HuaweiCloud OBS

[setoru]

Please add a summary of your change

Update docs to add HuaweiCloud OBS for HuaweiCloud Provider.

Please indicate you've done the following:

• [x] Accepted the DCO. Commits without the DCO will delay acceptance.
• [ ] Created a changelog file (make new-changelog) or comment /kind changelog-not-required on this PR.
• [x] Updated the corresponding documentation in site/content/docs/main.

[kaovilai]

/kind changelog-not-required

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 58.98%. Comparing base (9f0026d) to head (871ba8d).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #8438 +/- ## ======================================= Coverage 58.98% 58.98% ======================================= Files 368 368 Lines 39000 39000 ======================================= Hits 23004 23004 Misses 14532 14532 Partials 1464 1464 ```

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[setoru]

Are you working on this on a personal capacity? The repo referenced is on a personal account rather than as part of an organization.

Yes, I am working on this in a personal capacity, and the referenced repo is indeed under my personal account.