Use coreroot in CrossgenFramework target

Author: am11

src/tests/build.proj

@@ -651,10 +651,6 @@
       Condition="'$(__BuildTestWrappersOnly)' != '1' and '$(__CopyNativeTestBinaries)' != '1' and '$(__TestBuildMode)' == 'crossgen2' and !$(MonoAot) and !$(MonoFullAot)" >
 
     <PropertyGroup>
-      <CrossgenDir>$(__BinDir)\$(BuildArchitecture)</CrossgenDir>
-      <Crossgen2Path>$(CrossgenDir)\crossgen2\tools\crossgen2</Crossgen2Path>
-      <Crossgen2Path Condition="'$(TargetOS)' == 'windows'">$(Crossgen2Path).exe</Crossgen2Path>
-
       <CrossgenOutputDir>$(__TestIntermediatesDir)\crossgen.out</CrossgenOutputDir>
 
       <CrossgenCmd>$(DotNetCli)</CrossgenCmd>
@@ -674,7 +670,7 @@
       <CrossgenCmd Condition="'$(__CompositeBuildMode)' == ''">$(CrossgenCmd) --crossgen2-parallelism 1</CrossgenCmd>
 
       <CrossgenCmd>$(CrossgenCmd) --verify-type-and-field-layout</CrossgenCmd>
-      <CrossgenCmd>$(CrossgenCmd) --crossgen2-path "$(Crossgen2Path)"</CrossgenCmd>
+      <CrossgenCmd>$(CrossgenCmd) --crossgen2-path "$(CORE_ROOT)\crossgen2\crossgen2$(ExeSuffix)"</CrossgenCmd>
     </PropertyGroup>
 
     <Message Importance="High" Text="$(MsgPrefix)Compiling framework using Crossgen2: $(CrossgenCmd)" />