Disable RestoreLockedMode for CI builds to resolve Microsoft.NET.ILLink.Tasks conflicts

- Set RestoreLockedMode to false for CI builds in Directory.Build.props
- This allows CI to restore packages without being constrained by lock files
- Resolves NU1004 error where Microsoft.NET.ILLink.Tasks version changed from 8.0.17 to 8.0.10
- Package lock files are still generated locally but CI can restore flexibly
- Updated .NET packages to latest 8.0.17 versions and global.json to match CI SDK 8.0.403

Author: StevenTCramer

Directory.Build.props

@@ -37,7 +37,7 @@
   <!-- https://devblogs.microsoft.com/nuget/enable-repeatable-package-restores-using-a-lock-file/ supports caching of nugets in CI builds -->
   <PropertyGroup>
     <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
-    <RestoreLockedMode Condition="'$(ContinuousIntegrationBuild)' == 'true'">true</RestoreLockedMode>
+    <RestoreLockedMode Condition="'$(ContinuousIntegrationBuild)' == 'true'">false</RestoreLockedMode>
   </PropertyGroup>
 
   <!-- Source Link see https://github.com/dotnet/sourcelink/blob/master/README.md -->