feat: 增加 `HttpClientFactoryInterface` 方法用于工厂模式创建 http client

[yansongda]

close: #920

[netlify[bot]]

✅ Deploy Preview for pay-yansongda canceled.

Name	Link
🔨 Latest commit	1badf9d6ec995228079e5ef796eb77be71fb5c32
🔍 Latest deploy log	https://app.netlify.com/sites/pay-yansongda/deploys/65957c9b48557f00089c8042

[codecov[bot]]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (1d34898) 96.36% compared to head (1badf9d) 96.29%.

Files	Patch %	Lines
src/HttpClientFactory.php	62.50%	3 Missing :warning:
src/Provider/AbstractProvider.php	80.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #921 +/- ## ============================================ - Coverage 96.36% 96.29% -0.07% - Complexity 957 960 +3 ============================================ Files 338 339 +1 Lines 5856 5864 +8 ============================================ + Hits 5643 5647 +4 - Misses 213 217 +4 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.