[ci] Initial migration to Cirrus Apple silicon

This adopts the new Apple silicon images for:
- linting
- macOS platform tests
- iOS build-all

This gives us build coverage across both architectures for both iOS and
macOS.

Ideally we would use ARM for iOS platform tests instead of build-all,
but driving the iOS tests currently has flaky hangs on ARM. See
flutter#5693 for details. Completing
that part of the migration is left as a TODO.

.cirrus.yml

@@ -57,9 +57,17 @@ macos_template: &MACOS_TEMPLATE
  # Only one macOS task can run in parallel without credits, so use them for
  # PRs on macOS.
  use_compute_credits: $CIRRUS_USER_COLLABORATOR == 'true'
+
+macos_intel_template: &MACOS_INTEL_TEMPLATE
+ << : *MACOS_TEMPLATE
  osx_instance:
  image: big-sur-xcode-13
 
+macos_arm_template: &MACOS_ARM_TEMPLATE
+ << : *MACOS_TEMPLATE
+ macos_instance:
+ image: ghcr.io/cirruslabs/macos-monterey-xcode:13.4
+
 # Light-workload Linux tasks.
 # These use default machines, with fewer CPUs, to reduce pressure on the
 # concurrency limits.
@@ -298,7 +306,7 @@ task:
  drive_script:
  - ./script/tool_runner.sh drive-examples --web --exclude=script/configs/exclude_integration_web.yaml
 
-# macOS tasks.
+# ARM macOS tasks.
 task:
  << : *MACOS_TEMPLATE
  << : *FLUTTER_UPGRADE_TEMPLATE
@@ -315,6 +323,34 @@ task:
  CHANNEL: "master"
  CHANNEL: "stable"
  << : *BUILD_ALL_PLUGINS_APP_TEMPLATE
+ ### macOS desktop tasks ###
+ - name: macos-platform_tests
+ env:
+ matrix:
+ CHANNEL: "master"
+ CHANNEL: "stable"
+ PATH: $PATH:/usr/local/bin
+ build_script:
+ - flutter config --enable-macos-desktop
+ - ./script/tool_runner.sh build-examples --macos
+ xcode_analyze_script:
+ - ./script/tool_runner.sh xcode-analyze --macos
+ xcode_analyze_deprecation_script:
+ # Ensure we don't accidentally introduce deprecated code.
+ - ./script/tool_runner.sh xcode-analyze --macos --macos-min-version=12.3
+ native_test_script:
+ - ./script/tool_runner.sh native-test --macos
+ drive_script:
+ - ./script/tool_runner.sh drive-examples --macos --exclude=script/configs/exclude_integration_macos.yaml
+
+# Intel macOS tasks.
+task:
+ << : *MACOS_INTEL_TEMPLATE
+ << : *FLUTTER_UPGRADE_TEMPLATE
+ matrix:
+ # TODO(stuartmorgan): Swap this and ios-build_all_plugins once simulator
+ # tests are reliable on the ARM infrastructure. See discussion at
+ # https:/flutter/plugins/pull/5693#issuecomment-1126011089
  - name: ios-platform_tests
  env:
  PATH: $PATH:/usr/local/bin
@@ -345,6 +381,8 @@ task:
  # So we run `drive-examples` after `native-test`; changing the order will result ci failure.
  - ./script/tool_runner.sh drive-examples --ios --exclude=script/configs/exclude_integration_ios.yaml
  ### macOS desktop tasks ###
+ # macos-platform_tests builds all the plugins on M1, so this build is run
+ # on Intel to give us build coverage of both host types.
  - name: macos-build_all_plugins
  env:
  BUILD_ALL_ARGS: "macos"
@@ -354,21 +392,3 @@ task:
  setup_script:
  - flutter config --enable-macos-desktop
  << : *BUILD_ALL_PLUGINS_APP_TEMPLATE
- - name: macos-platform_tests
- env:
- matrix:
- CHANNEL: "master"
- CHANNEL: "stable"
- PATH: $PATH:/usr/local/bin
- build_script:
- - flutter config --enable-macos-desktop
- - ./script/tool_runner.sh build-examples --macos
- xcode_analyze_script:
- - ./script/tool_runner.sh xcode-analyze --macos
- xcode_analyze_deprecation_script:
- # Ensure we don't accidentally introduce deprecated code.
- - ./script/tool_runner.sh xcode-analyze --macos --macos-min-version=12.3
- native_test_script:
- - ./script/tool_runner.sh native-test --macos
- drive_script:
- - ./script/tool_runner.sh drive-examples --macos --exclude=script/configs/exclude_integration_macos.yaml