Auto merge of #123678 - DianQK:docker-local, r=Kobzol

Improve the experience of running Docker locally

When running locally, the absence of the `GITHUB_STEP_SUMMARY` environment variable will lead to the following error:

```
::endgroup::
./src/ci/docker/run.sh: line 349: : No such file or directory
```

I've also changed the output artifacts directory to `obj/$image_name`, allowing me to easily run all images locally. We always encounter various strange issues when modifying the test cases in the `codegen` directory.

r? Kobzol cc `@saethlin`

Author: bors