ci: move macOS jobs off the retiring macos-14 runner (#16088)

.github/workflows/build_orca.yml

@@ -183,10 +183,12 @@ jobs:
       - name: Free disk space
         if: runner.os == 'macOS' && !inputs.macos-combine-only && !vars.SELF_HOSTED
         run: |
-          df -hI /dev/disk3s1s1
-          sudo find /Applications -maxdepth 1 -type d -name "Xcode_*.app" ! -name "Xcode_15.4.app" -exec rm -rf {} +
+          df -hI /
+          # Keep only the selected Xcode
+          xcode=$(basename "$(cd "$(xcode-select -p)/../.." && pwd -P)")
+          sudo find /Applications -maxdepth 1 -type d -name "Xcode_*.app" ! -name "$xcode" -exec rm -rf {} +
           sudo rm -rf ~/Library/Developer/CoreSimulator/Caches/*
-          df -hI /dev/disk3s1s1
+          df -hI /
 
       - name: Build slicer mac
         if: runner.os == 'macOS' && !inputs.macos-combine-only