Revert "Don't use baseline assembly versions for RID-agnostic packages (#17970)"

This reverts commit 67424e7.

Author: dougbu

Directory.Build.targets

@@ -1,6 +1,8 @@
 <Project>
 
   <PropertyGroup>
+    <!-- When OnlyPackPlatformSpecificPackages is set, only produce packages for projects which set RuntimeIdentifier. -->
+    <IsPackable Condition=" '$(OnlyPackPlatformSpecificPackages)' == 'true' AND '$(IsPackable)' != 'false' AND '$(RuntimeIdentifier)' == '' ">false</IsPackable>
 
     <!--
       By default, assemblies which are only in the Microsoft.AspNetCore.App shared framework are not available as NuGet packages.
@@ -65,12 +67,6 @@
     <IsPackable Condition=" '$(IsPackageInThisPatch)' != 'true' ">false</IsPackable>
   </PropertyGroup>
 
-  <PropertyGroup>
-    <!-- When OnlyPackPlatformSpecificPackages is set, only produce packages for projects which set RuntimeIdentifier. -->
-    <!-- Keep this below where we set "IsPackageInThisPatch" -->
-    <IsPackable Condition=" '$(OnlyPackPlatformSpecificPackages)' == 'true' AND '$(RuntimeIdentifier)' == '' ">false</IsPackable>
-  </PropertyGroup>
-
   <PropertyGroup>
     <PackageVersionForPackageVersionInfo>$(PackageVersion)</PackageVersionForPackageVersionInfo>
   </PropertyGroup>