Prebuild host kernel package for kvm-nyx-6.0

Generated kernel packages for kvm-nyx-6.0

This release is now based on Ubuntu 22.04 kernel config (5.15.0-25-generic).
See the build-deb.yml workflow for more information.

Configuration tweaks:

# disable kernel signature
./scripts/config --disable SYSTEM_TRUSTED_KEYS
./scripts/config --disable SYSTEM_REVOCATION_KEYS
# compress debug info (otherwise might fail with 'no space left on device' on the runnner)
./scripts/config --enable DEBUG_INFO_COMPRESSED
# enable KVM
./scripts/config --module CONFIG_KVM
# enable Nyx
./scripts/config --enable CONFIG_KVM_NYX
# tweak locaversion
./scripts/config --set-str CONFIG_LOCALVERSION -nyx