Use Xcode 16.2 to build Zapbox (#830)

Force the default xcode to be 16.2 (currently 15.4 on macos-14 runners)
Manually install missing ios 18.2

Also, revert the cleanup when running fastlane because the Mac images now have a lot more room.

Author: mikeage

.github/workflows/build.yml

@@ -1390,10 +1390,11 @@ jobs:
           rm -rf "$AGENT_TOOLSDIRECTORY"
           echo "Disk space after cleanup of \$AGENT_TOOLSDIRECTORY"
           df -h
-          echo "Deleting all Xcode versions except 15.4"
-          find /Applications/Xcode_* -maxdepth 0 -type d ! -name 'Xcode_15.4.app' -exec rm -rf {} \;
-          df -h
-          find /Applications/Xcode* -name "*.app" -exec du -mcsh {} \;  # Shows Xcode app sizes
+
+      - name: Use xcode 16.2 / ios 18.2
+        run: |
+          sudo xcode-select -s /Applications/Xcode_16.2.app/Contents/Developer  # The default in macos-latest (i.e., 14) is currently 15.4.
+          xcodebuild -downloadPlatform iOS -buildVersion 18.2  # Because of https://github.com/actions/runner-images/issues/11335
 
       - name: Download iOS Artifact
         uses: actions/download-artifact@v4