CI: Update Linux build scripts to use CMake presets

Also adds source package generation and updates Cirrus CI script.

.github/scripts/utils.zsh/setup_linux

@@ -1,119 +0,0 @@
-autoload -Uz log_group log_error log_status log_info log_debug
-
-if (( ! ${+commands[curl]} )) {
-  log_error 'curl not available.'
-  return 2
-}
-
-if (( ! ${+commands[jq]} )) {
-  log_error 'jq not available.'
-  return 2
-}
-
-local -a curl_opts=(--show-error --silent --location -O ${@})
-
-pushd ${project_root}
-
-typeset -g QT_VERSION
-read -r QT_VERSION <<< \
-  "$(jq -r --arg target "${target}" \
-    '.platformConfig[$target] | { qtVersion } | join(" ")' \
-    ${buildspec_file})"
-
-log_group 'Installing obs-studio build dependencies...'
-
-mkdir -p ${project_root}/.deps
-local deps_version
-local deps_baseurl
-local deps_label
-local deps_hash
-
-IFS=';' read -r deps_version deps_baseurl deps_label deps_hash deps_revision <<< \
-  "$(jq -r --arg target "${target}" \
-    '.dependencies["cef"] | {version, baseUrl, "label", "hash": .hashes[$target], "revision": .revision[$target]} | join(";")' \
-    ${buildspec_file})"
-
-if (( ! deps_version )) {
-  log_error 'No valid cef spec found in buildspec.json.'
-  return 2
-}
-log_group 'Setting up pre-built Chromium Embedded Framework...'
-
-pushd ${project_root}/.deps
-local _filename="cef_binary_${deps_version}_${target//-/_}${deps_revision:+"_v${deps_revision}"}.tar.xz"
-local _url=${deps_baseurl}/${_filename}
-local _target="cef_binary_${deps_version}_${target//-/_}"
-typeset -g CEF_VERSION=${deps_version}
-
-log_debug "Running curl ${curl_opts} ${_url}"
-curl ${curl_opts} ${_url} && \
-  log_status "Downloaded ${deps_label} for ${target}."
-
-read -r artifact_checksum _ <<< "$(sha256sum ${_filename})"
-if [[ ${deps_hash} != ${artifact_checksum} ]] {
-  log_error "Checksum of downloaded ${deps_label} does not match specification.
-Expected : ${deps_hash}
-Actual   : ${artifact_checksum}"
-  return 2
-}
-log_status "Checksum of downloaded ${deps_label} matches."
-mkdir -p ${_target} && pushd ${_target}
-
-XZ_OPT=-T0 tar --strip-components 1 -xJf ../${_filename} && log_status "${deps_label} extracted."
-popd
-
-local suffix
-if [[ ${CPUTYPE} != ${target##*-} ]] {
-  local -A arch_mappings=(
-    aarch64 arm64
-    x86_64 amd64
-  )
-
-  suffix=":${arch_mappings[${target##*-}]}"
-  sudo apt-get install -y --no-install-recommends \
-    gcc-${${target##*-}//_/-}-linux-gnu g++-${${target##*-}//_/-}-linux-gnu
-}
-
-sudo apt-get install -y --no-install-recommends \
-  build-essential \
-  lsb-release dh-cmake \
-  libcurl4-openssl-dev \
-  libavcodec-dev libavdevice-dev libavfilter-dev libavformat-dev libavutil-dev \
-  libswresample-dev libswscale-dev \
-  libjansson-dev \
-  libx11-xcb-dev \
-  libgles2-mesa-dev libgles2-mesa \
-  libwayland-dev \
-  libpipewire-0.3-dev \
-  libpulse-dev \
-  libx264-dev \
-  libmbedtls-dev \
-  libgl1-mesa-dev \
-  libjansson-dev \
-  uthash-dev \
-  libluajit-5.1-dev python3-dev \
-  libx11-dev libxcb-randr0-dev libxcb-shm0-dev libxcb-xinerama0-dev \
-  libxcb-composite0-dev libxinerama-dev libxcb1-dev libx11-xcb-dev libxcb-xfixes0-dev \
-  swig libcmocka-dev libxss-dev libglvnd-dev \
-  libxkbcommon-dev \
-  libasound2-dev libfdk-aac-dev libfontconfig-dev libfreetype6-dev libjack-jackd2-dev \
-  libpulse-dev libsndio-dev libspeexdsp-dev libudev-dev libv4l-dev libva-dev libvlc-dev \
-  libpci-dev libdrm-dev \
-  nlohmann-json3-dev libwebsocketpp-dev libasio-dev libvpl-dev libvpl2 libqrcodegencpp-dev
-
-if (( UBUNTU_2210_OR_LATER )) sudo apt-get install -y --no-install-recommends librist-dev libsrt-openssl-dev
-
-local -a _qt_packages=()
-
-if (( QT_VERSION == 6 )) {
-  _qt_packages+=(
-    qt6-base-dev
-    libqt6svg6-dev
-    qt6-base-private-dev
-  )
-} else {
-  log_error "Unsupported Qt version '${QT_VERSION}' specified."
-  return 2
-}
-
-sudo apt-get install -y --no-install-recommends ${_qt_packages}