Add new option to fetch clinvar somatic classification + patch db for 115

[dglemos]

Ticket: https://www.ebi.ac.uk/panda/jira/browse/ENSVAR-5941 Add option to return new clinvar somatic classification.

• [x] update dump pipeline
• [x] add option to vep
• [x] output factory to return new data types
• [x] patch test db
• [x] fix and add tests

To test this code, please point to ensembl-variation update: https://github.com/Ensembl/ensembl-variation/pull/1117

[dglemos]

Tests fail because of missing method get_somatic_clin_impact_by_location. This is part of this PR https://github.com/Ensembl/ensembl-variation/pull/1117