Bec Asch

Expose maximum-training-variants VQSR parameter [VS-634]

1

Expose the maximum-training-variants parameter for both INDEL and SNP model creation in the `GvsCreateFilterSet` WDL. Closes https://broadworkbench.atlassian.net/browse/VS-634

test run (was aborted after changed logic ran successfully): https://app.terra.bio/#workspaces/gvs-dev/RSA%20-%20GVS%20Quickstart%20V2%20/job_history/ed86ae93-41e7-4487-b8b1-3fc184bc64c3

test run: https://app.terra.bio/#workspaces/gvs-dev/RSA%20-%20GVS%20Quickstart%20V2%20/job_history/52f8169b-f3b4-4145-a977-7a1e5dc3d807