feat: support http retrieval

[simlecode]

关联的Issues (Related Issues)

close #336

改动 (Proposed Changes)

附注 (Additional Info)

自查清单 (Checklist)

在你认为本 PR 满足被审阅的标准之前，需要确保 / Before you mark the PR ready for review, please make sure that:

• 符合Venus项目管理规范中关于PR的相关标准 / The PR follows the PR standards set out in the Venus project management guidelines
• 具有清晰明确的commit message / All commits have a clear commit message.
• 包含相关的的测试用例或者不需要新增测试用例 / This PR has tests for new functionality or change in behaviour or not need to add new tests.
• 包含相关的的指南以及文档或者不需要新增文档 / This PR has updated usage guidelines and documentation or not need
• 通过必要的检查项 / All checks are green

[codecov-commenter]

Codecov Report

Merging #338 (87f6b8f) into master (86a318f) will increase coverage by 0.19%.
The diff coverage is 23.28%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #338      +/-   ##
==========================================
+ Coverage   20.61%   20.81%   +0.19%     
==========================================
  Files         187      191       +4     
  Lines       22850    23142     +292     
==========================================
+ Hits         4710     4816     +106     
- Misses      17377    17542     +165     
- Partials      763      784      +21     

Flag	Coverage Δ
unittests	20.81% <23.28%> (+0.19%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
cmd/droplet-http/cli.go	0.00% <0.00%> (ø)
cmd/droplet-http/main.go	0.00% <0.00%> (ø)
config/common.go	100.00% <ø> (ø)
retrievalprovider/modules.go	0.00% <0.00%> (ø)
retrievalprovider/provider.go	0.00% <0.00%> (ø)
retrievalprovider/transports.go	0.00% <0.00%> (ø)
cmd/droplet-http/server.go	53.96% <53.96%> (ø)

... and 5 files with indirect coverage changes

[hunjixin]

LGTM

[Fatman13]

👍👍👍 赞。正好今天 boost 在 venus 里面问了一嘴 venus 的 http 支持怎么样了。

https://filecoinproject.slack.com/archives/CEHHJNJS3/p1686852778678829