Convert helix.proj and codecoverage.proj to Central Package Management

Co-authored-by: ericstj <8918108+ericstj@users.noreply.github.com>

Author: Copilot

Directory.Packages.props

@@ -99,11 +99,14 @@
     <PackageVersion Include="Xunit.Combinatorial" Version="$(XunitCombinatorialVersion)" />
 
     <!-- Build/infrastructure dependencies -->
+    <PackageVersion Include="Codecov" Version="$(CodecovVersion)" />
     <PackageVersion Include="Drop.App" Version="$(DropAppVersion)" />
+    <PackageVersion Include="Microsoft.DotNet.Build.Tasks.Templating" Version="$(MicrosoftDotNetBuildTasksTemplatingVersion)" />
     <PackageVersion Include="Microsoft.DotNet.IBCMerge" Version="$(MicrosoftDotNetIBCMergeVersion)" />
     <PackageVersion Include="Microsoft.ManifestTool.CrossPlatform" Version="$(MicrosoftManifestToolCrossPlatformVersion)" />
     <PackageVersion Include="Microsoft.VisualStudioEng.MicroBuild.Core" Version="$(MicrosoftVisualStudioEngMicroBuildCoreVersion)" />
     <PackageVersion Include="Microsoft.VisualStudioEng.MicroBuild.Plugins.SwixBuild" Version="$(MicrosoftVisualStudioEngMicroBuildPluginsSwixBuildVersion)" />
+    <PackageVersion Include="ReportGenerator" Version="$(ReportGeneratorVersion)" />
 
     <!-- Special cases - packages with specific versions not using properties -->
     <PackageVersion Include="MathNet.Numerics.Signed" Version="5.0.0" />

build/Codecoverage.proj

@@ -6,8 +6,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Codecov" Version="$(CodecovVersion)" GeneratePathProperty="true" />
-    <PackageReference Include="ReportGenerator" Version="$(ReportGeneratorVersion)" GeneratePathProperty="true" />
+    <PackageReference Include="Codecov" GeneratePathProperty="true" />
+    <PackageReference Include="ReportGenerator" GeneratePathProperty="true" />
   </ItemGroup>
 
   <Target Name="Codecov">

eng/helix.proj

@@ -91,7 +91,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.DotNet.Build.Tasks.Templating" Version="$(MicrosoftDotNetBuildTasksTemplatingVersion)" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.DotNet.Build.Tasks.Templating" PrivateAssets="All" />
   </ItemGroup>
 
   <Target Name="CreateHelixWorkItems" BeforeTargets="BeforeTest">