feat: allow failover to distinguish between different endpoint of the same provider

[cr7258]

Ⅰ. Describe what this PR did

相同的 provider 用户可能会配置不同的 endpoint，该 PR 将 provider 和 id 拼接起来作为 shared data 的 key，使得 failover 可以区分这种情况。

Ⅱ. Does this pull request fix one issue?

fixes #1816

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.43%. Comparing base (ef31e09) to head (47f7e15).
Report is 335 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1862      +/-   ##
==========================================
+ Coverage   35.91%   43.43%   +7.52%     
==========================================
  Files          69       76       +7     
  Lines       11576    12301     +725     
==========================================
+ Hits         4157     5343    +1186     
+ Misses       7104     6626     -478     
- Partials      315      332      +17     

see 71 files with indirect coverage changes

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[CH3CHO]

LGTM