Reorganize Versions files to indicate compilers is not automated (#26329)

Author: pranavkm

eng/Version.Details.xml

@@ -320,9 +320,5 @@
       <Uri>https://github.com/dotnet/arcade</Uri>
       <Sha>b63ea25b8dc50bb3dfcef128d415254bd5ca4dc8</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="3.8.0-3.20458.6" Pinned="true">
-      <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>b446afd34759150c2ea3b86ab794104e12e64db1</Sha>
-    </Dependency>
   </ToolsetDependencies>
 </Dependencies>

eng/Versions.props

@@ -59,8 +59,6 @@
 
   -->
   <PropertyGroup Label="Automated">
-    <!-- Packages from dotnet/roslyn -->
-    <MicrosoftNetCompilersToolsetPackageVersion>3.8.0-3.20458.6</MicrosoftNetCompilersToolsetPackageVersion>
     <!-- Packages from dotnet/runtime -->
     <MicrosoftExtensionsDependencyModelPackageVersion>5.0.0-rc.2.20474.8</MicrosoftExtensionsDependencyModelPackageVersion>
     <MicrosoftNETCoreAppInternalPackageVersion>5.0.0-rc.2.20474.8</MicrosoftNETCoreAppInternalPackageVersion>
@@ -157,6 +155,7 @@
     <MicrosoftNETCoreAppRuntimeVersion>$(MicrosoftNETCoreAppRuntimewinx64PackageVersion)</MicrosoftNETCoreAppRuntimeVersion>
   </PropertyGroup>
   <PropertyGroup Label="Manual">
+    <MicrosoftNetCompilersToolsetPackageVersion>3.8.0-3.20458.6</MicrosoftNetCompilersToolsetPackageVersion>
     <!-- DiagnosticAdapter package pinned temporarily until migrated/deprecated -->
     <MicrosoftExtensionsDiagnosticAdapterPackageVersion>5.0.0-preview.4.20180.4</MicrosoftExtensionsDiagnosticAdapterPackageVersion>
     <!-- Build tool dependencies -->