chore: enable generation for django-google-spanner

[parthea]

This PR re-enables generation for django-google-spanner which was temporarily skipped due to #16839

This PR was created using

export V=v0.11.0
go run github.com/googleapis/librarian/tool/cmd/builddockerimages@${V} --version ${V} --language python
docker run -u $(id -u):$(id -g) -v .:/repo -v ~/.cache:/.cache -w /repo docker.io/library/librarian-python:${V} generate -v django-google-spanner

[gemini-code-assist]

Code Review

This pull request updates the configuration for the django-google-spanner library by removing the skip_generate flag in librarian.yaml and deleting the name_pretty field in the .repo-metadata.json file. I have no further feedback to provide.

[noahdietz]

Thanks for running regen too!