ci: add retry option for snakemake workflow

[FabianHofmann]

Add retry option to CI, if snakemake workflow failed

Changes proposed in this Pull Request

Checklist

• [ ] I tested my contribution locally and it seems to work fine.
• [ ] Code and workflow changes are sufficiently documented.
• [ ] Changed dependencies are added to envs/environment.yaml.
• [ ] Changes in configuration options are added in all of config.default.yaml.
• [ ] Changes in configuration options are also documented in doc/configtables/*.csv.
• [ ] A release note doc/release_notes.rst is added.

[fneum]

Seems like the environment is not activated inside the retry tool.