Move trimming properties to .targets file in src\

Author: Sergio0694

build/Community.Toolkit.Common.targets

@@ -17,10 +17,4 @@
     <None Include="$(RepositoryDirectory)ThirdPartyNotices.txt" Pack="true" PackagePath="\" Visible="False" />
   </ItemGroup>
 
-  <!-- Configure trimming for core projects on .NET 6 and above -->
-  <PropertyGroup Condition="'$(IsCoreProject)' == 'true' AND ('$(TargetFramework)' == 'net6.0' OR '$(TargetFramework)' == 'net7.0')">
-    <EnableTrimAnalyzer>true</EnableTrimAnalyzer>
-    <IsTrimmable>true</IsTrimmable>
-  </PropertyGroup>
-
 </Project>

src/Directory.Build.targets

@@ -2,6 +2,12 @@
 <Project>
   <Import Project="..\Directory.Build.targets" />
 
+  <!-- Configure trimming for projects on .NET 6 and above -->
+  <PropertyGroup Condition="'$(TargetFramework)' == 'net6.0' OR '$(TargetFramework)' == 'net7.0'">
+    <EnableTrimAnalyzer>true</EnableTrimAnalyzer>
+    <IsTrimmable>true</IsTrimmable>
+  </PropertyGroup>
+
   <!--
     The following target has been ported from TerraFX.Interop.Windows.
     See: https://github.com/terrafx/terrafx.interop.windows.