[Infra] Move 'client_app' workflow to Xcode 16 (#14684)

Author: ncooke3

.github/workflows/client_app.yml

@@ -25,19 +25,20 @@ concurrency:
 jobs:
  client-app-spm:
  if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
- runs-on: macos-14
  strategy:
  matrix:
  #TODO(ncooke3): Add multi-platform support: tvOS, macOS, catalyst
  platform: [iOS]
  scheme: [ClientApp]
+ os: [macos-14, macos-15]
+ runs-on: ${{ matrix.os }}
  steps:
  - uses: actions/checkout@v4
  - uses: mikehardy/buildcache-action@c87cea0ccd718971d6cc39e672c4f26815b6c126
  with:
  cache_key: ${{ matrix.os }}
  - name: Xcode
- run: sudo xcode-select -s /Applications/Xcode_15.2.app/Contents/Developer
+ run: sudo xcode-select -s /Applications/Xcode_16.2.app/Contents/Developer
  - name: Build Client App –– ${{ matrix.platform }}
  run: scripts/third_party/travis/retry.sh ./scripts/build.sh ${{ matrix.scheme }} ${{ matrix.platform }} xcodebuild
 
@@ -46,29 +47,31 @@ jobs:
  env:
  FIREBASECI_USE_LATEST_GOOGLEAPPMEASUREMENT: 1
  FIREBASE_SOURCE_FIRESTORE: 1
- runs-on: macos-14
  strategy:
  matrix:
  #TODO(ncooke3): Add multi-platform support: tvOS, macOS, catalyst
  platform: [iOS]
  scheme: [ClientApp]
+ os: [macos-14, macos-15]
+ runs-on: ${{ matrix.os }}
  steps:
  - uses: actions/checkout@v4
  - uses: mikehardy/buildcache-action@c87cea0ccd718971d6cc39e672c4f26815b6c126
  with:
  cache_key: ${{ matrix.os }}
  - name: Xcode
- run: sudo xcode-select -s /Applications/Xcode_15.2.app/Contents/Developer
+ run: sudo xcode-select -s /Applications/Xcode_16.2.app/Contents/Developer
  - name: Build Client App –– ${{ matrix.platform }}
  run: scripts/third_party/travis/retry.sh ./scripts/build.sh ${{ matrix.scheme }} ${{ matrix.platform }} xcodebuild
 
  client-app-cocoapods:
  # Don't run on private repo unless it is a PR.
  if: (github.repository == 'Firebase/firebase-ios-sdk' && github.event_name == 'schedule') || github.event_name == 'pull_request'
- runs-on: macos-14
  strategy:
  matrix:
  scheme: [ClientApp-CocoaPods]
+ os: [macos-14, macos-15]
+ runs-on: ${{ matrix.os }}
  steps:
  - uses: actions/checkout@v4
  - uses: mikehardy/buildcache-action@c87cea0ccd718971d6cc39e672c4f26815b6c126
@@ -78,7 +81,7 @@ jobs:
  - name: Setup Bundler
  run: scripts/setup_bundler.sh
  - name: Xcode
- run: sudo xcode-select -s /Applications/Xcode_15.2.app/Contents/Developer
+ run: sudo xcode-select -s /Applications/Xcode_16.2.app/Contents/Developer
  - name: Prereqs
  run: scripts/install_prereqs.sh ClientApp iOS xcodebuild
  - name: Build