Specify iOS simulator version. (microsoft#483)

Author: edgchen1

ci_build/azure_pipelines/templates/xcode-build-and-test-step.yml

@@ -20,7 +20,13 @@ steps:
     packageApp: false
     destinationPlatformOption: 'iOS'
     destinationTypeOption: 'simulators'
-    destinationSimulators: 'iPhone 15'
+    # Note: The simulator version should be compatible with the Xcode version.
+    # Refer to the table here: https://developer.apple.com/support/xcode/
+    # Pick a simulator version that is supported by the Xcode version.
+    #
+    # Xcode version: "/Applications/Xcode_<version>.app/Contents/Developer" in xcodeDeveloperDir
+    # Simulator version: "OS=<version>" in destinationSimulators
+    destinationSimulators: 'iPhone 15,OS=17.5'
     ${{ if ne(parameters.args, '') }}:
       args: ${{ parameters.args }}
   displayName: "Xcode build and test"