ci: Various fixes (#2331)

Author: Saadnajmi

.ado/scripts/xcodebuild.sh

@@ -70,6 +70,8 @@ if ! command -v xcbeautify 1> /dev/null; then
   brew install xcbeautify
 fi
 
+xcodebuild -downloadAllPlatforms
+
 eval "$build_cmd" | xcbeautify --report junit
 
 if [[ "$CCACHE_DISABLE" != "1" ]]; then

.ado/templates/apple-tools-setup.yml

@@ -1,7 +1,7 @@
 steps:
   - task: UseNode@1
     inputs:
-      version: '23.x'
+      versionSpec: '23.x'
 
   - script: |
       brew bundle --file .ado/Brewfile

.ado/variables/vars.yml

@@ -1,6 +1,6 @@
 variables:
   VmImageApple: macos-latest-internal
-  xcode_friendly_name: 'Xcode 15.2'
-  xcode_version: '/Applications/Xcode_15.2.app'
-  ios_version: '17.2'
-  ios_simulator: 'iPhone 15'
+  xcode_friendly_name: 'Xcode 16.2'
+  xcode_version: '/Applications/Xcode_16.2.app'
+  ios_version: '18.0'
+  ios_simulator: 'iPhone 16'