Azure Batch: HBv2, HC and NP-series VM retirement

Microsoft retires support for HBv2-series, HC-series and NP-series VMs in Azure Batch pools on 31 May 2027. After that date, new Batch pools with these VM sizes cannot be created, and existing pools are subject to forced resize to zero nodes. Existing pools cannot be updated in place, so a new pool is required. The NP-series has no direct replacement.

1. Migrate Batch pools to supported VM sizes before 31 May 2027.
2. Move HBv2-series pools to HBv3-series or HBv4-series, and HC-series pools to HX-series.
3. For NP-series pools, evaluate GPU-based NC/ND-series VMs or partner FPGA solutions.
4. Create a new pool, because existing pools cannot be updated in place.
5. Microsoft refers to the Batch pool VM sizes documentation and the update pool properties guide for instructions.