Do not include -dead_strip when native linking a NativeAOT object file (

xamarin#18553)

This PR disables passing `-dead_strip` to the native linker in case of
NativeAOT runtime to prevent build failures.

Additionally, this change affects the size of the application in the
following way - measured with `dotnet new maui` app version
`8.0.0-preview.7.23359.1`:

| MAUI iOS | -dead_strip | no -dead_strip | diff (b) | diff (Kb) | diff
(%) |
|----------|--------------|----------|----------|-----------|----------|
| .ipa (b) | 13377583 | 13435276 | 57693 | 57,693 | 0,43% |
| Size on disk (b) | 41883897 | 42038873 | 154976 | 154,976 | 0,37% |
| binary (b) | 39614336 | 39769312 | 154976 | 154,976 | 0,39% |

Even though the size of the application regresses, with this change we
have a more stable product.

Finally, once this PR gets merged we can open a tracking issue to solve
the size regression either by fixing:
- dotnet/runtime#88032 or
- by manually removing the dead code as proposed by @filipnavara here:
dotnet/runtime#88032 (comment)

--- 
Fixes: xamarin#18552

tools/dotnet-linker/Steps/ComputeNativeBuildFlagsStep.cs

@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 
 using Xamarin.Utils;
+using Xamarin.Bundler;
 
 #nullable enable
 
@@ -51,7 +52,8 @@ protected override void TryEndProcess ()
 				Configuration.Application.DeadStrip = false;
 
 			var mainLinkerFlags = new List<MSBuildItem> ();
-			if (Configuration.Application.DeadStrip) {
+			// Do not pass -dead_strip to the native linker with object files generated by NativeAOT compiler as it can cause the linker to seg fault
+			if (Configuration.Application.DeadStrip && Configuration.Application.XamarinRuntime != XamarinRuntime.NativeAOT) {
 				mainLinkerFlags.Add (new MSBuildItem ("-dead_strip"));
 			}
 			Configuration.WriteOutputForMSBuild ("_AssemblyLinkerFlags", mainLinkerFlags);