mainly update since v2.8.0:

• utils: add amd64-version-support-check.sh
• lib/libtest.sh: avoid repeated loading, and add function tcnt()
• split macOS-kvm-utils to https://github.com/tcler/macOS-kvm-utils
• kiss-vm: --genimage, add arch info in final image name
• utils/xfstests-install.sh: install ndctl by default for dax test
• utils: add get-nic-ipaddrs.sh
• utils: fix typos and add addbridge.sh
• kiss-vm: use bridge(if exists) instead default macvtap virtual NIC
• kiss-vm vm-editor: use vim as editor by default
• kiss-vm: change NIC order on rhel/centos/rocky/alma... to adjust default route
• kiss-vm: s/inst.ks=/ks=/ on rhel-5,rhel-6
• kiss-vm: fix ssh rhel-5,6 fail that due to: no matching host key type
• misc other bug fixes and code optimize

for more details:
Full Changelog: v2.8.0...v2.8.2b