chore: build updates; ubuntu 22.04, remove svn, Makefile feature-flags, re-add Dockerfile#25

vanillaSprinkles wants to merge 1 commit intoipxe:masteripxe/pipxe:masterfrom

vanillaSprinkles:vs/20240225/refactor_svn_git_update_build_os_to_ubuntu_22.04vanillaSprinkles/fork__ipxe__pipxe:vs/20240225/refactor_svn_git_update_build_os_to_ubuntu_22.04Copy head branch name to clipboard