Fix S4507 FP: relax env.IsDevelopment(); sanitizer

[andrei-epure-sonarsource]

S4507

Currently the following code will raise an issue:

   var isDevelopmentEnvironment = env.IsDevelopment();
   if (isDevelopmentEnvironment)
   {
        app.UseDeveloperExceptionPage(); // FP
    }

This is a minor security hotspot, so it's not worth investing in a complex dataflow capability.

We should reduce the level of FPs by checking if env.IsDevelopment() is invoked in the same method/class and not raise issues in that case.

Conversation: https://community.sonarsource.com/t/make-sure-this-debug-feature-is-deactivated-before-delivering-the-code-in-production/42336/4 (see internal as well)