Fix warning CS7022 "The entry point of the program is global code; ignoring 'AutoGeneratedProgram.Main(string[])' entry point."

Author: jnm2

tools/ExampleTester/ExampleTester.csproj

@@ -5,6 +5,7 @@
     <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <GenerateProgramFile>false</GenerateProgramFile>
   </PropertyGroup>
 
   <ItemGroup>