Clone case

[sbreiff]

This PR adds a check and action for cloning cases. In this current version, a new meta-wfr is associated with the cloned case(s) but it will be newly created and start from scratch - i.e. we won't be able to specify a particular step to start from and clone the old meta-wfr. We intend to implement that ability in a later version after this first version is in.

get_metadata_for_cases_to_clone check:

• needs version and accessions kwargs
• looks up uuid of the metawf that should be attached to the cloned case
• case ignored if no meta-wfr already on it
• case ignored if meta-wfr on it is associated with a meta-wf that doesn't have a version specified in the kwarg (e.g., if a case has a mwfr from WGS trio v24, and v25 is the latest version of WGS trio metawf, but v26 was put in the kwarg, then this case will get ignored)
• case ignored if meta-wfr on it is already the version specified in the kwarg

clone_cases action:

• clones cases (if its a group analysis, will also clone non-proband cases)
• clones samples, creates new sample_processing
• family, individual, fastq items not duplicated but are associated properly
• new meta-wfr is created with specified version but will start from scratch