Use PolySharp for [DynamicallyAccessedMembers] (#2883)

* Use PolySharp for DynamicallyAccessedMembersAttribute.

* Generate only the necessary types.

Author: timcassell

src/BenchmarkDotNet.Annotations/Attributes/DynamicallyAccessedMemberTypes.cs

@@ -11,6 +11,19 @@
     <ProduceReferenceAssembly>True</ProduceReferenceAssembly>
     <Nullable>enable</Nullable>
   </PropertyGroup>
+  <!-- Settings for PolySharp -->
+  <PropertyGroup>
+    <PolySharpIncludeGeneratedTypes>
+      System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute,
+      System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes
+    </PolySharpIncludeGeneratedTypes>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="PolySharp" Version="1.15.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
   <ItemGroup>
     <Compile Include="..\BenchmarkDotNet\Helpers\CodeAnnotations.cs" Link="Attributes\CodeAnnotations.cs" />
   </ItemGroup>

src/BenchmarkDotNet.Annotations/Attributes/DynamicallyAccessedMembersAttribute.cs

@@ -51,10 +51,6 @@
   <ItemGroup>
     <ProjectReference Include="..\BenchmarkDotNet.Annotations\BenchmarkDotNet.Annotations.csproj" />
   </ItemGroup>
-  <ItemGroup Condition=" '$(TargetFrameworkIdentifier)' == '.NETStandard' ">
-    <Compile Include="..\BenchmarkDotNet.Annotations\Attributes\DynamicallyAccessedMembersAttribute.cs" Link="Properties\DynamicallyAccessedMembersAttribute.cs" />
-    <Compile Include="..\BenchmarkDotNet.Annotations\Attributes\DynamicallyAccessedMemberTypes.cs" Link="Properties\DynamicallyAccessedMemberTypes.cs" />
-  </ItemGroup>
   <ItemGroup>
     <Compile Include="..\BenchmarkDotNet.Disassembler.x64\DataContracts.cs" Link="Disassemblers\DataContracts.cs" />
   </ItemGroup>