[ci] Part 1 of swapping iOS task arch

Adds Intel versions of iOS build-all and ARM versions of iOS platform
tests, as part one of swapping them. Once the new tasks propagate, they
will be brought out of bringup mode and the old versions removed.

These were on the opposite architectures because of issues with running
the platfor tests on Cirrus ARM VMs, and then were ported as-is from
Cirrus to LUCI, but now that macOS ARM works on LUCI we can switch to
the desired configuration.

Author: stuartmorgan-g

.ci.yaml

@@ -129,6 +129,26 @@ targets:
       version_file: flutter_stable.version
       target_file: ios_build_all_plugins.yaml
 
+  - name: Mac_x64 ios_build_all_plugins master
+    bringup: true # New task, replaces ARM version
+    recipe: plugins/plugins
+    timeout: 30
+    properties:
+      channel: master
+      add_recipes_cq: "true"
+      version_file: flutter_master.version
+      target_file: ios_build_all_plugins.yaml
+
+  - name: Mac_x64 ios_build_all_plugins stable
+    bringup: true # New task, replaces ARM version
+    recipe: plugins/plugins
+    timeout: 30
+    properties:
+      channel: stable
+      add_recipes_cq: "true"
+      version_file: flutter_stable.version
+      target_file: ios_build_all_plugins.yaml
+
   # TODO(stuartmorgan): Swap the architecture of this and ios_build_all_plugins
   # once simulator tests are reliable on the ARM infrastructure. See discussion
   # at https://github.com/flutter/plugins/pull/5693#issuecomment-1126011089
@@ -168,6 +188,46 @@ targets:
       target_file: ios_platform_tests.yaml
       package_sharding: "--shardIndex 3 --shardCount 4"
 
+  - name: Mac_arm64 ios_platform_tests_1_of_4 master
+    bringup: true # New task; will replace Intel version
+    recipe: plugins/plugins
+    timeout: 60
+    properties:
+      add_recipes_cq: "true"
+      version_file: flutter_master.version
+      target_file: ios_platform_tests.yaml
+      package_sharding: "--shardIndex 0 --shardCount 4"
+
+  - name: Mac_arm64 ios_platform_tests_2_of_4 master
+    bringup: true # New task; will replace Intel version
+    recipe: plugins/plugins
+    timeout: 60
+    properties:
+      add_recipes_cq: "true"
+      version_file: flutter_master.version
+      target_file: ios_platform_tests.yaml
+      package_sharding: "--shardIndex 1 --shardCount 4"
+
+  - name: Mac_arm64 ios_platform_tests_3_of_4 master
+    bringup: true # New task; will replace Intel version
+    recipe: plugins/plugins
+    timeout: 60
+    properties:
+      add_recipes_cq: "true"
+      version_file: flutter_master.version
+      target_file: ios_platform_tests.yaml
+      package_sharding: "--shardIndex 2 --shardCount 4"
+
+  - name: Mac_arm64 ios_platform_tests_4_of_4 master
+    bringup: true # New task; will replace Intel version
+    recipe: plugins/plugins
+    timeout: 60
+    properties:
+      add_recipes_cq: "true"
+      version_file: flutter_master.version
+      target_file: ios_platform_tests.yaml
+      package_sharding: "--shardIndex 3 --shardCount 4"
+
   # Don't run full platform tests on both channels in pre-submit.
   - name: Mac_x64 ios_platform_tests_1_of_4 stable
     recipe: plugins/plugins
@@ -213,6 +273,54 @@ targets:
       target_file: ios_platform_tests.yaml
       package_sharding: "--shardIndex 3 --shardCount 4"
 
+  - name: Mac_arm64 ios_platform_tests_1_of_4 stable
+    bringup: true # New task; will replace Intel version
+    recipe: plugins/plugins
+    presubmit: false
+    timeout: 60
+    properties:
+      channel: stable
+      add_recipes_cq: "true"
+      version_file: flutter_stable.version
+      target_file: ios_platform_tests.yaml
+      package_sharding: "--shardIndex 0 --shardCount 4"
+
+  - name: Mac_arm64 ios_platform_tests_2_of_4 stable
+    bringup: true # New task; will replace Intel version
+    recipe: plugins/plugins
+    presubmit: false
+    timeout: 60
+    properties:
+      channel: stable
+      add_recipes_cq: "true"
+      version_file: flutter_stable.version
+      target_file: ios_platform_tests.yaml
+      package_sharding: "--shardIndex 1 --shardCount 4"
+
+  - name: Mac_arm64 ios_platform_tests_3_of_4 stable
+    bringup: true # New task; will replace Intel version
+    recipe: plugins/plugins
+    presubmit: false
+    timeout: 60
+    properties:
+      channel: stable
+      add_recipes_cq: "true"
+      version_file: flutter_stable.version
+      target_file: ios_platform_tests.yaml
+      package_sharding: "--shardIndex 2 --shardCount 4"
+
+  - name: Mac_arm64 ios_platform_tests_4_of_4 stable
+    bringup: true # New task; will replace Intel version
+    recipe: plugins/plugins
+    presubmit: false
+    timeout: 60
+    properties:
+      channel: stable
+      add_recipes_cq: "true"
+      version_file: flutter_stable.version
+      target_file: ios_platform_tests.yaml
+      package_sharding: "--shardIndex 3 --shardCount 4"
+
   - name: Windows win32-platform_tests master
     recipe: plugins/plugins
     timeout: 60