CI: remove macos-11; rename macos-13-xl to macos-13-large

- macos-11 is no longer available
  https://github.blog/changelog/2024-05-20-actions-upcoming-changes-to-github-hosted-macos-runners/

- macos-13-xl was silently renamed to macos-13-large at some point

Signed-off-by: Akihiro Suda <[email protected]>

Author: AkihiroSuda

.github/workflows/release.yml

@@ -14,7 +14,7 @@ on:
       - 'master'
 jobs:
   release:
-    runs-on: macos-11
+    runs-on: macos-12
     timeout-minutes: 20
     steps:
       - uses: actions/checkout@v4

.github/workflows/test.yml

@@ -12,8 +12,10 @@ jobs:
     name: Integration tests
     strategy:
       matrix:
-        # macos-13-xl is used as macos-13 seems too flaky
-        platform: [macos-11, macos-12, macos-13-xl]
+        # macos-13-large is used as macos-13 seems too flaky.
+        # macos-14 (ARM) cannot be used for the most part of the job
+        # due to the lack of the support for nested virt.
+        platform: [macos-12, macos-13-large]
     runs-on: ${{ matrix.platform }}
     timeout-minutes: 40
     steps: