[Infra] Update performance workflow to use macOS 15 for Xcode 16

Author: andrewheard

.github/workflows/performance.yml

@@ -55,16 +55,19 @@ jobs:
     strategy:
       matrix:
         target: [ios, tvos]
-        os: [macos-14]
-        xcode: [Xcode_15.2, Xcode_16]
-    runs-on: ${{ matrix.os }}
+        build-env:
+          - os: macos-14
+            xcode: Xcode_15.2
+          - os: macos-15
+            xcode: Xcode_16.1
+    runs-on: ${{ matrix.build-env.os }}
     steps:
     - uses: actions/checkout@v4
     - uses: ruby/setup-ruby@v1
     - name: Setup Bundler
       run: scripts/setup_bundler.sh
     - name: Xcode
-      run: sudo xcode-select -s /Applications/${{ matrix.xcode }}.app/Contents/Developer
+      run: sudo xcode-select -s /Applications/${{ matrix.build-env.xcode }}.app/Contents/Developer
     - name: Build
     #TODO: tests are not supported with Xcode 15 because the test spec depends on the iOS 8 GDCWebServer
       run: scripts/third_party/travis/retry.sh scripts/pod_lib_lint.rb FirebasePerformance.podspec --skip-tests --platforms=${{ matrix.target }}
@@ -155,10 +158,10 @@ jobs:
             xcode: Xcode_15.4
             target: iOS
           - os: macos-15
-            xcode: Xcode_16
+            xcode: Xcode_16.1
             target: iOS
           - os: macos-15
-            xcode: Xcode_16
+            xcode: Xcode_16.1
             target: tvOS
     runs-on: ${{ matrix.os }}
     steps: