-Oz generates a .vcf.gz!!

https://github.com/IKIM-Essen/uncovar/blob/a0b6fd0557b7e6cb3aeddd22e6a3350560c18415/workflow/rules/variant_calling.smk#L103

```python

    conda:
        "../envs/bcftools.yaml"
    shell:
        "bcftools view -Oz -o {output} {input} 2> {log}"  # TODO -Oz generates a .vcf.gz!!


rule render_scenario:

```