Fix wrong mobile build Docker image (#119213)
It turns out that the Docker image name hasn't been updated yet referring to a non-existing name, may be we could update `calculate-docker-image` to fail in this case if there is a way to separate a non-existing name failure v.s. missing tag failure.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/119213
Approved by: https://github.com/clee2000, https://github.com/kit1980, https://github.com/malfet
