Run slow macOS checks on larger runners

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

.github/workflows/__all-platform-bundle.yml

@@ -56,7 +56,7 @@ jobs:
         include:
           - os: ubuntu-latest
             version: nightly-latest
-          - os: macos-latest
+          - os: macos-latest-xlarge
             version: nightly-latest
           - os: windows-latest
             version: nightly-latest

.github/workflows/__swift-custom-build.yml

@@ -54,11 +54,11 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - os: macos-latest
+          - os: macos-latest-xlarge
             version: linked
-          - os: macos-latest
+          - os: macos-latest-xlarge
             version: default
-          - os: macos-latest
+          - os: macos-latest-xlarge
             version: nightly-latest
     name: Swift analysis using a custom build command
     if: github.triggering_actor != 'dependabot[bot]'