Feat: support aliyun oss backend.

[divinerapier]

Overview

This PR adds support for using Aliyun Object Storage Service (OSS) as a backend storage option.

Changes

• Implement OSS storage adapter
• Add configuration options for OSS credentials and endpoint

[divinerapier]

@zeroshade Fixed, PTAL

[zeroshade]

This seems generally good to me. Does Aliyun have something similar to how MinIO works for S3 that can be added to the integration tests to have CI testing the backend? i.e. is there any way to use a docker image to run something that simulates the Aliyun backend for testing?

[divinerapier]

@zeroshade

Automated integration testing is indeed crucial. However, unfortunately, I haven't yet found a reasonable and convenient way to access OSS services in the integration testing environment.

I've tried the following approaches:

• Contacted Aliyun's customer service to inquire about recommended solutions. They suggested using OSS cloud services directly, but this raises questions about who would provide the account and access permissions.
• Attempted to simulate OSS using MinIO, but unfortunately, whether using v1 or v4 signatures, it always results in 400 errors. We suspect that OSS's signature scheme is incompatible with MinIO's.
• MinIO previously offered a project called minio-gateway-oss, but it was deprecated in 2022.

Therefore, regarding OSS integration testing implementation, I haven't been able to identify other viable solutions.

Since this modification is being used in our company's actual project, the good news is that we haven't encountered any issues in production so far.

[zeroshade]

the Java iceberg impl has some mocking and test setups for Aliyun as seen here would it make sense to create a similar utility in Go? or is it not worth that effort there?

Is there any sort of testing we could add here for this?