8369226: GHA: Switch to MacOS 15

Reviewed-by: mdoerr
Backport-of: 1ea8cfa6dc8e6f96fd87553331abaae17ec173ea

Author: shipilev

.github/workflows/main.yml

@@ -235,8 +235,8 @@ jobs:
     uses: ./.github/workflows/build-macos.yml
     with:
       platform: macos-x64
-      runs-on: 'macos-13'
-      xcode-toolset-version: '14.3.1'
+      runs-on: 'macos-15-intel'
+      xcode-toolset-version: '16.4'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
     if: needs.prepare.outputs.macos-x64 == 'true'
@@ -247,8 +247,8 @@ jobs:
     uses: ./.github/workflows/build-macos.yml
     with:
       platform: macos-aarch64
-      runs-on: 'macos-14'
-      xcode-toolset-version: '15.4'
+      runs-on: 'macos-15'
+      xcode-toolset-version: '16.4'
       configure-arguments: ${{ github.event.inputs.configure-arguments }}
       make-arguments: ${{ github.event.inputs.make-arguments }}
     if: needs.prepare.outputs.macos-aarch64 == 'true'
@@ -301,8 +301,8 @@ jobs:
     with:
       platform: macos-aarch64
       bootjdk-platform: macos-aarch64
-      runs-on: macos-14
-      xcode-toolset-version: '15.4'
+      runs-on: macos-15
+      xcode-toolset-version: '16.4'
 
   test-windows-x64:
     name: windows-x64