Moving from GetOlds to GetOldInputs to avoid having to manually remove properties

[IaroslavTitov]

Summary

• Moving all Diff methods to compare inputs rather than final properties
• This way we don't need to remove properties to avoid a diff, code is more straightforward

Testing

• All the resources are checked for diff by integ tests
• Testing envrionment resource manually

[komalali]

@IaroslavTitov why did you have to check the environment resource manually?

[IaroslavTitov]

@IaroslavTitov why did you have to check the environment resource manually?

Oh, I didn't necessarily need to, I just had it locally already, so decided to test on it