[ci] Use our own pool (#24754)

eng/pipelines/device-tests.yml

@@ -72,14 +72,20 @@ parameters:
   - name: iosPool
     type: object
     default:
-      name: $(macosTestsVmPool)
-      vmImage: macOS-14
+      name: $(iosTestsVmPool)
+      vmImage: $(iosTestsVmImage)
+      demands:
+        - macOS.Name -equals Sonoma
+        - macOS.Architecture -equals x64
 
   - name: catalystPool
     type: object
     default:
-      name: $(macosTestsVmPool)
-      vmImage: macOS-14
+      name: $(iosTestsVmPool)
+      vmImage: $(iosTestsVmImage)
+      demands:
+        - macOS.Name -equals Sonoma
+        - macOS.Architecture -equals x64
 
   - name: windowsPool
     type: object

eng/pipelines/ui-tests.yml

@@ -88,8 +88,11 @@ parameters:
   - name: macosPool
     type: object
     default:
-      name: $(macosTestsVmPool)
-      vmImage: macOS-14
+      name: $(iosTestsVmPool)
+      vmImage: $(iosTestsVmImage)
+      demands:
+        - macOS.Name -equals Sonoma
+        - macOS.Architecture -equals x64
 
   - name: androidCompatibilityPool
     type: object