add options to disable and override ExplicitExpansion

[Angelinsky7]

replace #4326
Pr to implement https://github.com/AutoMapper/AutoMapper/discussions/4325
from discussion from here : https://github.com/AutoMapper/AutoMapper/discussions/4323

[Angelinsky7]

@lbargaoanu i think i corrected almost everything. (apart from the override parameter that i really would like to talk about)

[lbargaoanu]

This should use mapping inheritance, the same as the test below.

[Angelinsky7]

@lbargaoanu i added a new test for constructor mapping with inheritance (sorry for the long delay i needed to change my computer)

[Angelinsky7]

if you do that, you loose all the advantage of doing this pr !
i don't understand why you would want to make all user need to change all their code by needing to pass a value (it breaks compatibility)

[lbargaoanu]

Obviously it doesn't, all the existing tests pass.

[lbargaoanu]

Well, that's what's needed here. The ForAllMembers stuff is ForAllOtherMembers in disguise, nothing that makes sense for AM. If you want that, just add an if as I've already said.