Switch to Arcade model for PackageIcon (dotnet/extensions#2663)

* Switch to Arcade model for PackageIcon

* Update dependencies from Arcade

* Update dependencies from Arcade

* Switch to dotnet-eng
\n\nCommit migrated from dotnet/extensions@cad4d7d

Author: wtgodbe

src/FileProviders/Embedded/src/Microsoft.Extensions.FileProviders.Embedded.csproj

@@ -32,6 +32,5 @@
     <NuspecProperty Include="OutputDocumentation=$(OutputPath)**\$(AssemblyName).xml" />
     <NuspecProperty Include="TaskAssemblyNetStandard=$(ArtifactsDir)bin\$(AssemblyName).Manifest.Task\$(Configuration)\netstandard2.0\$(AssemblyName).Manifest.Task.dll"/>
     <NuspecProperty Include="TaskSymbolNetStandard=$(ArtifactsDir)bin\$(AssemblyName).Manifest.Task\$(Configuration)\netstandard2.0\$(AssemblyName).Manifest.Task.pdb" Condition="'$(DebugType)'!='embedded'"/>
-    <NuspecProperty Include="PackageIcon=$(PackageIconFullPath)" />
   </ItemGroup>
 </Project>

src/FileProviders/Embedded/src/Microsoft.Extensions.FileProviders.Embedded.multitarget.nuspec

@@ -10,16 +10,15 @@
         <dependency id="Microsoft.Extensions.FileProviders.Abstractions" version="$version$" exclude="Build,Analyzers" />
       </group>
     </dependencies>
-    <icon>packageIcon.png</icon>
   </metadata>
 
   <files>
+    $CommonFileElements$
     <file src="$OutputBinary$" target="lib\" />
     <file src="$OutputSymbol$" target="lib\" />
     <file src="$OutputDocumentation$" target="lib\" />
     <file src="build\**\*" target="build\" />
     <file src="buildMultiTargeting\**\*" target="buildMultiTargeting\" />
-    <file src="$PackageIcon$" target="" />
     <file src="$TaskAssemblyNetStandard$" target="tasks\netstandard2.0\$AssemblyName$.Manifest.Task.dll" />
     <file src="$TaskSymbolNetStandard$" target="tasks\netstandard2.0\$AssemblyName$.Manifest.Task.pdb" />
   </files>

src/FileProviders/Embedded/src/Microsoft.Extensions.FileProviders.Embedded.netcoreapp3.0.nuspec

@@ -7,16 +7,15 @@
         <dependency id="Microsoft.Extensions.FileProviders.Abstractions" version="$version$" exclude="Build,Analyzers" />
       </group>
     </dependencies>
-    <icon>packageIcon.png</icon>
   </metadata>
 
   <files>
+    $CommonFileElements$
     <file src="$OutputBinary$" target="lib\" />
     <file src="$OutputSymbol$" target="lib\" />
     <file src="$OutputDocumentation$" target="lib\" />
     <file src="build\**\*" target="build\" />
     <file src="buildMultiTargeting\**\*" target="buildMultiTargeting\" />
-    <file src="$PackageIcon$" target="" />
     <file src="$TaskAssemblyNetStandard$" target="tasks\netstandard2.0\$AssemblyName$.Manifest.Task.dll" />
     <file src="$TaskSymbolNetStandard$" target="tasks\netstandard2.0\$AssemblyName$.Manifest.Task.pdb" />
   </files>