Update WiX to signed build (#36865)

- #12078

Author: dougbu

eng/targets/Wix.Common.props

@@ -4,7 +4,7 @@
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
     <ProductVersion>3.14</ProductVersion>
-    <WixVersion>3.14.0-dotnet</WixVersion>
+    <WixVersion>1.0.0-v3.14.0.4118</WixVersion>
   </PropertyGroup>
 
   <PropertyGroup>
@@ -20,7 +20,7 @@
   <Import Project="$(MSBuildProjectExtensionsPath)$(MSBuildProjectFile).*.props" Condition="'$(_ProjectExtensionsWereImported)' != 'true'" />
 
   <ItemGroup>
-    <PackageReference Include="Wix" Version="$(WixVersion)" />
+    <PackageReference Include="Microsoft.Signed.Wix" Version="$(WixVersion)" />
   </ItemGroup>
 
   <PropertyGroup>

eng/tools/RepoTasks/RepoTasks.csproj

@@ -26,7 +26,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net472'">
-    <PackageReference Include="Wix" Version="3.11.1" />
+    <PackageReference Include="Microsoft.Signed.Wix" Version="1.0.0-v3.14.0.4118" />
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
 
     <Reference Include="Microsoft.Build" />