ci: Run "macOS native x86_64" job on GitHub Actions

Also, the "macOS native arm64" task has been removed from Cirrus CI.

.cirrus.yml

@@ -334,20 +334,3 @@ task:
   env:
     MACOS_SDK: "Xcode-12.2-12B45b-extracted-SDK-with-libcxx-headers"
     << : *CIRRUS_EPHEMERAL_WORKER_TEMPLATE_ENV
-
-task:
-  name: 'macOS 13 native arm64 [gui, sqlite only] [no depends]'
-  macos_instance:
-    # Use latest image, but hardcode version to avoid silent upgrades (and breaks)
-    image: ghcr.io/cirruslabs/macos-ventura-xcode:14.3.1  # https://cirrus-ci.org/guide/macOS
-  << : *BASE_TEMPLATE
-  check_clang_script:
-    - clang --version
-  brew_install_script:
-    - brew install boost libevent qt@5 miniupnpc libnatpmp ccache zeromq qrencode libtool automake gnu-getopt
-  << : *MAIN_TEMPLATE
-  env:
-    << : *CIRRUS_EPHEMERAL_WORKER_TEMPLATE_ENV
-    CI_USE_APT_INSTALL: "no"
-    PACKAGE_MANAGER_INSTALL: "echo"  # Nothing to do
-    FILE_ENV: "./ci/test/00_setup_env_mac_native_arm64.sh"