This patch version implements necessary changes for working with Variant Datasets with haploid calls. The substantial backports are:
- [vds/combiner] Stop dropping GT in reference data during gvcf import (https://github.com/hail-is/hail/pull/14560)
- [vds/combiner] Fix truncation of PL in GVCF import with haploid calls (https://github.com/hail-is/hail/pull/14577)