Remove target framework from extutilities since it inherits it from directory.build.props (#3178)

Author: benrr101

src/Microsoft.Data.SqlClient/tests/tools/Microsoft.Data.SqlClient.ExtUtilities/Microsoft.Data.SqlClient.ExtUtilities.csproj

@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net9.0</TargetFramework>
     <StartupObject>Microsoft.Data.SqlClient.ExtUtilities.Runner</StartupObject>
   </PropertyGroup>
   <ItemGroup>