[cDAC] fix condition to only link in native unwinders on Windows x64 (#112999)

Unblocks official build as it was failing on win-arm64.

Author: max-charlamb

src/native/managed/cdacreader/src/cdacreader.csproj

@@ -34,10 +34,10 @@
   <ItemGroup>
     <!-- TODO: Link libraries on non-windows platforms. -->
     <!-- https://github.com/dotnet/runtime/issues/112416 -->
-    <DirectPInvoke Include="unwinder_cdac_amd64" />
-    <NativeLibrary Include="$(CoreCLRArtifactsPath)cdaclibs\unwinder_cdac_amd64.lib" Condition="'$(TargetsWindows)' == 'true'" />
-    <DirectPInvoke Include="unwinder_cdac_arm64" />
-    <NativeLibrary Include="$(CoreCLRArtifactsPath)cdaclibs\unwinder_cdac_arm64.lib" Condition="'$(TargetsWindows)' == 'true'" />
+    <DirectPInvoke Include="unwinder_cdac_amd64" Condition="'$(TargetsWindows)' == 'true' and '$(TargetArchitecture)' == 'x64'"/>
+    <NativeLibrary Include="$(CoreCLRArtifactsPath)cdaclibs\unwinder_cdac_amd64.lib" Condition="'$(TargetsWindows)' == 'true' and '$(TargetArchitecture)' == 'x64'" />
+    <DirectPInvoke Include="unwinder_cdac_arm64" Condition="'$(TargetsWindows)' == 'true' and '$(TargetArchitecture)' == 'x64'"/>
+    <NativeLibrary Include="$(CoreCLRArtifactsPath)cdaclibs\unwinder_cdac_arm64.lib" Condition="'$(TargetsWindows)' == 'true' and '$(TargetArchitecture)' == 'x64'" />
   </ItemGroup>
 
   <ItemGroup>