Undo RepoTasks workaround (#59058)

* Undo RepoTasks workaround

* Update RepoTasks.tasks

Author: wtgodbe

eng/tools/RepoTasks/RepoTasks.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net9.0</TargetFrameworks>
+    <TargetFrameworks>$(DefaultNetCoreTargetFramework)</TargetFrameworks>
     <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">$(TargetFrameworks);net472</TargetFrameworks>
     <DefineConstants Condition="'$(TargetFramework)' == 'net472'">$(DefineConstants);BUILD_MSI_TASKS</DefineConstants>
     <Optimize>false</Optimize>
@@ -31,7 +31,7 @@
     <Compile Remove="shared\CertificateGeneration\*.cs" />
   </ItemGroup>
 
-  <ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
+  <ItemGroup Condition="'$(TargetFramework)' == '$(DefaultNetCoreTargetFramework)'">
     <PackageReference Include="Microsoft.Build.Framework" Version="$(MicrosoftBuildFrameworkVersion)" />
     <PackageReference Include="Microsoft.Build.Tasks.Core" Version="$(MicrosoftBuildTasksCoreVersion)" />
     <PackageReference Include="Microsoft.Build.Utilities.Core" Version="$(MicrosoftBuildUtilitiesCoreVersion)" />

eng/tools/RepoTasks/RepoTasks.tasks

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <_RepoTaskAssemblyFolder Condition="'$(MSBuildRuntimeType)' == 'core'">net9.0</_RepoTaskAssemblyFolder>
+    <_RepoTaskAssemblyFolder Condition="'$(MSBuildRuntimeType)' == 'core'">$(DefaultNetCoreTargetFramework)</_RepoTaskAssemblyFolder>
     <_RepoTaskAssemblyFolder Condition="'$(MSBuildRuntimeType)' != 'core'">net472</_RepoTaskAssemblyFolder>
     <_RepoTaskAssembly>$(ArtifactsBinDir)RepoTasks\Release\$(_RepoTaskAssemblyFolder)\RepoTasks.dll</_RepoTaskAssembly>
   </PropertyGroup>