add arguments for the new --containerize functionality

[m-jahn]

• since Snakemake v9.17.0, the --containerize parameter supports one additional argument, apptainer or docker (the default)
• this is not yet reflected in this action, which just uses the default without supporting the new additional CLI argument, and also writes the container recipe to the hardcoded Dockerfile output
• to accomodate these changes we need to implement a new arg which is passed to the container step, and adjust the container defintion's file name.