build: switch to macos-15 runner

build/mac/find_sdk.py now requires macOS 15 SDK as a minimum version. The
macos 15 runners default to an Xcode using the 15 SDK and removes older
versions.

.github/actions/free-space-macos/action.yml

@@ -62,10 +62,9 @@ runs:
 
         sudo rm -rf /Applications/Safari.app
         sudo rm -rf /Applications/Xcode_16.1.app
-        sudo rm -rf /Applications/Xcode_16.3.app
         sudo rm -rf /Applications/Xcode_16.2.app
+        sudo rm -rf /Applications/Xcode_16.3.app
         sudo rm -rf /Applications/Google Chrome.app
-        sudo rm -rf /Applications/Xcode_16.4.app
         sudo rm -rf /Applications/Google Chrome for Testing.app
         sudo rm -rf	/Applications/Firefox.app
         sudo rm -rf ~/project/src/third_party/catapult/tracing/test_data

.github/workflows/build.yml

@@ -189,7 +189,7 @@ jobs:
     with:
       target-platform: macos
       target-archs: x64 arm64
-      check-runs-on: macos-14
+      check-runs-on: macos-15
       gn-build-type: testing
     secrets: inherit
 
@@ -225,7 +225,7 @@ jobs:
     uses: ./.github/workflows/pipeline-electron-build-and-test.yml
     needs: checkout-macos
     with:
-      build-runs-on: macos-14-xlarge
+      build-runs-on: macos-15-xlarge
       test-runs-on: macos-15-large
       target-platform: macos
       target-arch: x64
@@ -244,7 +244,7 @@ jobs:
     uses: ./.github/workflows/pipeline-electron-build-and-test.yml
     needs: checkout-macos
     with:
-      build-runs-on: macos-14-xlarge
+      build-runs-on: macos-15-xlarge
       test-runs-on: macos-15
       target-platform: macos
       target-arch: arm64