Use new publicly-available M1 runners

https://github.blog/changelog/2024-01-30-github-actions-introducing-the-new-m1-macos-runner-available-to-open-source/

.github/workflows/ci.yml

@@ -375,7 +375,7 @@ jobs:
               NO_DEBUG_ASSERTIONS: 1
               NO_OVERFLOW_CHECKS: 1
               DIST_REQUIRE_ALL_TOOLS: 1
-            os: macos-13-xlarge
+            os: macos-14
           - name: aarch64-apple
             env:
               SCRIPT: "./x.py --stage 2 test --host=aarch64-apple-darwin --target=aarch64-apple-darwin"
@@ -388,7 +388,7 @@ jobs:
               NO_LLVM_ASSERTIONS: 1
               NO_DEBUG_ASSERTIONS: 1
               NO_OVERFLOW_CHECKS: 1
-            os: macos-13-xlarge
+            os: macos-14
           - name: x86_64-msvc
             env:
               RUST_CONFIGURE_ARGS: "--build=x86_64-pc-windows-msvc --enable-profiler"

src/ci/github-actions/ci.yml

@@ -93,7 +93,7 @@ x--expand-yaml-anchors--remove:
     <<: *base-job
 
   - &job-macos-m1
-    os: macos-13-xlarge
+    os: macos-14
     <<: *base-job
 
   - &job-windows-8c