Update to .NET 10 (#19869)

* Update to .NET 10 and C# 14

* Remove reflection usage in AvaloniaAccessHelper

* Fix Android nullability errors

* Fix WindowMetrics.WindowInsets removed from AndroidX

* Update pipelines

* Fix ValidateApiDiff for missing frameworks

* Fix Windows integration tests

* Update Xamarin.AndroidX.Window to 1.5.0

* Fix MacCatalyst supported version

* Remove unused Xunit.Extensions.Ordering

* Try to fix macOS integration tests

* Update pipeline runner to macOS 15

* Disable LeakTests

* Fix .NET Framework unit tests

* Fix BuildTests

* Bump minimum Android API level to 24

* Update to .NET 10 RTM

* Update XamlX

* update android insets and activity code to handle deprecated behaviors in api 36

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Co-authored-by: Emmanuel Hansen <emmausssss@gmail.com>

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "8.0.411",
+    "version": "10.0.100",
     "rollForward": "latestFeature"
   },
   "msbuild-sdks": {