[CI] Switch macos version to keep the support of Xcode 15.4 (#3689)

Author: testableapple

.github/workflows/cron-checks.yml

@@ -28,7 +28,7 @@ jobs:
             setup_runtime: false
           - ios: 17.5
             xcode: 15.4
-            os: macos-15
+            os: macos-14
             device: "iPhone 15 Pro"
             setup_runtime: false
           - ios: 16.4
@@ -101,7 +101,7 @@ jobs:
             setup_runtime: false
           - ios: 17.5
             xcode: 15.4
-            os: macos-15
+            os: macos-14
             device: "iPhone 15 Pro"
             setup_runtime: false
           - ios: 16.4
@@ -148,7 +148,7 @@ jobs:
 
   build-old-xcode:
     name: Build LLC + UI (Xcode 15)
-    runs-on: macos-15
+    runs-on: macos-14
     env:
       XCODE_VERSION: "15.4"
     steps:
@@ -175,7 +175,7 @@ jobs:
 
   automated-code-review:
     name: Automated Code Review
-    runs-on: macos-15
+    runs-on: macos-14
     env:
       XCODE_VERSION: "15.4"
     steps:

.github/workflows/smoke-checks.yml

@@ -46,7 +46,7 @@ jobs:
 
   automated-code-review:
     name: Automated Code Review
-    runs-on: macos-15
+    runs-on: macos-14
     env:
       XCODE_VERSION: "15.4"
     if: ${{ github.event.inputs.record_snapshots != 'true' }}
@@ -67,7 +67,7 @@ jobs:
 
   build-old-xcode:
     name: Build LLC + UI (Xcode 15)
-    runs-on: macos-15
+    runs-on: macos-14
     if: ${{ github.event.inputs.record_snapshots != 'true' }}
     env:
       XCODE_VERSION: "15.4"