[3.13] gh-137638: Use macos-15-intel in GitHub Actions (GH-139154) (#139790)

Co-authored-by: Jacob Coffee <jacob@z7x.org>
Co-authored-by: 🇺🇦 Sviatoslav Sydorenko (Святослав Сидоренко) <wk.cvs.github@sydorenko.org.ua>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: 3 people

.github/workflows/build.yml

@@ -255,13 +255,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # Cirrus and macos-14 are M1, macos-13 is default GHA Intel.
+        # Cirrus and macos-14 are M1, macos-15-intel is default GHA Intel.
         # macOS 13 only runs tests against the GIL-enabled CPython.
         # Cirrus used for upstream, macos-14 for forks.
         os:
         - ghcr.io/cirruslabs/macos-runner:sonoma
         - macos-14
-        - macos-13
+        - macos-15-intel
         is-fork:  # only used for the exclusion trick
         - ${{ github.repository_owner != 'python' }}
         free-threading:
@@ -272,7 +272,7 @@ jobs:
           is-fork: true
         - os: macos-14
           is-fork: false
-        - os: macos-13
+        - os: macos-15-intel
           free-threading: true
     uses: ./.github/workflows/reusable-macos.yml
     with:

.github/workflows/jit.yml

@@ -82,7 +82,7 @@ jobs:
             compiler: msvc
           - target: x86_64-apple-darwin/clang
             architecture: x86_64
-            runner: macos-13
+            runner: macos-15-intel
             compiler: clang
           - target: aarch64-apple-darwin/clang
             architecture: aarch64