[Housekeeping] Update CI Pipeline to use macOS Sonoma and Xcode 15.3.0 (#1969)

* Update azure-pipelines.yml

* Update azure-pipelines.yml

* Update azure-pipelines.yml

* Revert "Update azure-pipelines.yml"

This reverts commit 410b02a60a.

azure-pipelines.yml

@@ -27,7 +27,7 @@ variables:
   PathToCommunityToolkitAnalyzersUnitTestCsproj: 'src/CommunityToolkit.Maui.Analyzers.UnitTests/CommunityToolkit.Maui.Analyzers.UnitTests.csproj'
   DotNetMauiRollbackFile: 'https://maui.blob.core.windows.net/metadata/rollbacks/8.0.6.json'
   CommunityToolkitSampleApp_Xcode_Version: '15.2.0'
-  CommunityToolkitLibrary_Xcode_Version: '15.2.0'
+  CommunityToolkitLibrary_Xcode_Version: '15.3.0'
 
 trigger:
   branches:
@@ -59,7 +59,7 @@ jobs:
         'Windows':
           image: 'windows-latest'
         'macOS':
-          image: 'macos-13'
+          image: 'macos-14'
     pool:
       vmImage: $(image)
     steps:
@@ -132,7 +132,7 @@ jobs:
         'Windows':
           image: 'windows-latest'
         'macOS':
-          image: 'macos-13'
+          image: 'macos-14'
     pool:
       vmImage: $(image)
     steps: