✨ Accept ISpecimentBuilder as value generator for With

[Kralizek]

Description

I have to work with a class with a string property whose valid value is limited to few option (a missed enum).

I can use ElementsBuilder<string> to do so but the configuration is a bit cumbersome.

It would be great if With accepted ISpecimenBuilder directly.

Example

fixture.Customize<SomeProduct>(o => o
    .With(p => p.OperatingSystem, (IFixture f) => f.Build<string>().FromFactory(new ElementsBuilder<string>(new[]{"ios", "windows", "mac"})).Create())
);

could be written as

// IPostprocessComposer<T> With<TProperty, TInput>(Expression<Func<T, TProperty>> propertyPicker, ISpecimenBuilder valueFactory);
fixture.Customize<SomeProduct>(o => o
    .With(p => p.OperatingSystem, new ElementsBuilder<string>(new[]{"ios", "windows", "mac"}))
);

[aivascu]

Implemented in #1444. Available after AutoFixture v5.0.0-preview009