Write out DEL/DUP from DRAGEN CNV calling as SVTYPE={DEL,DUP}

[holtgrewe]

Is your feature request related to a problem? Please describe.
Dragen CNV writes out DEL/DUP with SVTYPE=CNV. We should rather write it out as SV_TYPE={DEL,DUP}, depending on the actual allele.

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Describe alternatives you've considered
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Additional context
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