add link.xml so we don't strip our test assemblies.

Assets/link.xml

+<linker>
+       <assembly fullname="Unity.PerformanceTesting" preserve="all"/>
+	   <assembly fullname="Unity.GraphicTests.Performance.Runtime" preserve="all"/>
+	   <assembly fullname="Unity.PerformanceTesting.Editor" preserve="all"/>
+	   <assembly fullname="Unity.GraphicTests.Performance.Editor" preserve="all"/>
+	   <assembly fullname="UnityEngine.TestTools.Graphics" preserve="all"/>
+	   <assembly fullname="Unity.GraphicTests.Performance.Universal.Runtime" preserve="all"/>	
+       <assembly fullname="com.unity.test.performance.runtimesettings" preserve="all"/>		
+	   <assembly fullname="com.unity.test.metadata-manager" preserve="all"/>		
+	   <assembly fullname="nunit.framework" preserve="all"/>		
+	   <assembly fullname="Newtonsoft.Json" preserve="all"/>		
+	   <assembly fullname="Unity.RenderPipelines.Core.Runtime" preserve="all"/>	   
+	   <assembly fullname="com.unity.cliprojectsetup" preserve="all"/>	
+	   <assembly fullname="Unity.Addressables.Editor" preserve="all"/>	
+	   <assembly fullname="UnityEngine.TestRunner" preserve="all"/>	
+</linker>

Assets/link.xml.meta

+fileFormatVersion: 2
+guid: 7211b8db245a62242967a9cf711c7660
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: