StaticRoutesGenerator was removed more than 7 years ago (#8049) and InjectedRoutesGenerator has become the only possible way. Therefore, I see no reason to have a two very similar scripted tests.

After analysing the difference between routes-compiler-injected-routes-compilation and routes-compiler-routes-compilation folders I copied some cases that were not covered by routes-compiler-routes-compilation and completely removed routes-compiler-injected-routes-compilation.