ci(apple): fix CI runners with explicit Xcode version (#17634)

Author: russellwheatley

.github/workflows/all_plugins.yaml

@@ -133,6 +133,8 @@ jobs:
       - uses: subosito/flutter-action@f2c4f6686ca8e8d6e6d0f28410eeef506ed66aff
         with:
           channel: 'stable'
+      - name: Xcode
+        run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
       - name: Setup firebase_core example app to test Swift integration
         # run this before running melos boostrap to ensure the example app is set up
         run: |

.github/workflows/e2e_tests_fdc.yaml

@@ -100,6 +100,8 @@ jobs:
         name: Install Node.js 20
         with:
           node-version: '20'
+      - name: Xcode
+        run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
       - uses: actions/setup-java@8df1039502a15bceb9433410b1a100fbe190c53b
         with:
           distribution: 'temurin'

.github/workflows/ios.yaml

@@ -39,6 +39,8 @@ jobs:
         name: Install Node.js 20
         with:
           node-version: '20'
+      - name: Xcode
+        run: sudo xcode-select -s /Applications/Xcode_16.4.app/Contents/Developer
       - uses: actions/setup-java@8df1039502a15bceb9433410b1a100fbe190c53b
         with:
           distribution: 'temurin'