Configurable filters

Implement configurable filters

• Rework all filters to be configurable.
• Merge AlleleFilter's filter_alleles() and filter_analyses() into one generic function requiring a filter config (filter_alleles(filter_config_id, ...)).
• Add filterconfig table to database, connected to usergroup.
• Split today's genepanel config into 'acmg' property under user (usergroup) config and 'filters' key in filterconfig.
• Remove genepanel config.
• Some minor cleanup of dead code.

Closes LA-1291