Require both overlap and breakend proximity for depth-only SV clustering

[mwalker174]

SV clustering uses both reciprocal overlap and a maximum endpoint distance criteria. Currently, calls with only depth evidence are clustered differently from other classes in that only one of these two is required. However, this is confusing, unnecessary, and problematic in certain cases (it was convenient originally for the first modules ported in GATK-SV).

This PR changes depth-only calls to be treated as other classes, requiring both criteria to be met.

Note that increasing the endpoint window to a very high number (10Mbp) effectively retains the original behavior and is now the default value.