feat(filesystem): Support sub-directories for cdn/proxy domain

[YUDONGLING]

Support use sub-directories for cdn/proxy domain, eg. https://download-proxy.example.com/sub-folder/....

• [x] 本机存储 / local: https://download-proxy.example.com/sub-folder/api/v3/file/...
• [x] 从机存储 / remote: https://download-proxy.example.com/sub-folder/api/v3/slave/...
• [x] 阿里云 OSS / oss: https://download-proxy.example.com/sub-folder/{path-to-your-file}.
• [x] 腾讯云 COS / cos: similar to oss
• [x] OneDrive / onedrive: similar to oss
• [x] 七牛 / qiniu: native support via SDK
• [x] 又拍云 / upyun: native support via SDK
• [ ] AWS S3: not support

[codecov[bot]]

Codecov Report

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

Project coverage is 88.42%. Comparing base (3edb00a) to head (0e431ee). Report is 2 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2116 +/- ## ========================================== + Coverage 88.40% 88.42% +0.01% ========================================== Files 102 102 Lines 8927 8939 +12 ========================================== + Hits 7892 7904 +12 Misses 854 854 Partials 181 181 ```

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