feat(hyperv): implement Hyper-V image build via QEMU/KVM

[yuravk]

This introduces an alternative implementation for building Hyper-V Vagrant boxes using QEMU/KVM. This allows Hyper-V images to be built on Linux hosts, removing the dependency on a Windows host running the Hyper-V hypervisor.

To achieve this, the build process produces a RAW disk image via QEMU, which is subsequently converted to VHDX and packaged.

Changes:

• Add new Packer sources (qemu.almalinux-*-hyperv-x86_64) for AlmaLinux 8, 9, 10, and Kitten. These sources utilize QEMU/KVM guest definitions combined with Vagrant-specific configurations (boot commands, credentials, and Ansible playbooks).
• Configure a shell-local post-processor in Packer to convert the resulting QEMU RAW artifact into a VHDX-based Vagrant box.
• Add tools/raw-to-vagrant-hyperv.sh helper script to handle the RAW-to-VHDX conversion and tar+gzip packaging.
• Add tpl/vagrant/hyperv/box.xml as the common Vagrant box configuration template for Hyper-V.
• Create ansible/hyperv.yml playbook to configure the QEMU guest for Hyper-V compatibility.
• Update ansible/roles/hyperv_guest/tasks/main.yml to:
  • Remove the qemu-guest-agent package to prevent conflicts.
  • Upgrade initramfs to include hv_netvsc and hv_storvsc drivers (specifically for AL8).
• Extend variables.pkr.hcl with hyperv_boot_command_*_x86_64 variables.

CI:

• Add support for building Hyper-V images as Cloud Images option (non-Vagrant). They are also build with Vagrant Images 'ALL' option.
• Enable package list extraction from the .raw file format.