feat(thanos): add support for aliyun oss and baidu bos

[ashwanthgoli]

What this PR does / why we need it:
Adds support for aliyun oss and baidu bos thanos clients.

Which issue(s) this PR fixes:
Fixes #

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Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
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[ashwanthgoli]

@liguozhong, @arcosx loki is planning to introduce object store clients based off https://github.com/thanos-io/objstore, but we do not have a test environment to run a sanity check for aliyun oss and baidu bos.

I noticed that you folks added the support for these providers. It would be great if you could help run a sanity check with this change on your test environment :) Happy to help with any questions you have

[arcosx]

@liguozhong, @arcosx loki is planning to introduce object store clients based off https://github.com/thanos-io/objstore, but we do not have a test environment to run a sanity check for aliyun oss and baidu bos.

I noticed that you folks added the support for these providers. It would be great if you could help run a sanity check with this change on your test environment :) Happy to help with any questions you have

OK，I will test for bos.

[ashwanthgoli]

@arcosx thanks a lot! Just to clarity, thanos clients have to be explicitly enabled by setting -use-thanos-objstore=true
and the storage has to be configured in the object_store block or using cli flags with prefix-object-store.bos.

storage_config:
  object_store:
    bos:
      bucket: ****

[JoaoBraveCoding]

From a code POV lgtm

[JoaoBraveCoding]

Just noticed: with thanos-io/objstore#147 merged we can now define these for these two no? Also fine to do it on a follow up

[ashwanthgoli]

both bos and oss do not have a any way to configure retries, that's what i gathered from my last search :)