Rollup merge of #143786 - nikic:ci-job-name-fallback, r=marcoieni

Fix fallback for CI_JOB_NAME

If CI_JOB_NAME is not specified, it's supposed to fall back to the image name, which is `$image`, not `$IMAGE`.

Failing to set the correct CI_JOB_NAME causes failures when running `dist-ohos-*` images locally.

Author: matthiaskrgr