Revert "Run Mac hostonly tests on any available arch (flutter#119762)" (flutter#119784)

This reverts commit 475fc4a.

Author: jmagman

.ci.yaml

@@ -78,6 +78,7 @@ platform_properties:
         ]
       os: Mac-12
       device_type: none
+      cpu: x86 # TODO(jmagman): https://github.com/flutter/flutter/issues/112130
       xcode: 14a5294e # xcode 14.0 beta 5
   mac_arm64:
     properties:
@@ -2696,6 +2697,8 @@ targets:
       task_name: flutter_packaging
       tags: >
         ["framework", "hostonly", "shard", "mac"]
+    dimensions:
+      cpu: "arm64"
 
   - name: Mac flutter_view_macos__start_up
     presubmit: false
@@ -3009,7 +3012,6 @@ targets:
     recipe: devicelab/devicelab_drone
     timeout: 60
     properties:
-      cpu: x86 # https://github.com/flutter/flutter/issues/119750
       dependencies: >-
         [
           {"dependency": "xcode", "version": "14a5294e"},
@@ -3065,6 +3067,7 @@ targets:
     recipe: flutter/flutter_drone
     timeout: 60
     properties:
+      cpu: arm64
       dependencies: >-
         [
           {"dependency": "xcode", "version": "14a5294e"},
@@ -4911,6 +4914,8 @@ targets:
       task_name: flutter_packaging
       tags: >
         ["framework", "hostonly", "shard", "mac"]
+    dimensions:
+      cpu: "arm64"
 
   - name: Windows flutter_packaging
     recipe: packaging_v2/packaging_v2