DynamicClassAttribute is a descriptor defined in Python's Lib/types.py
which changes the behaviour of an attribute depending on if it is looked
up on the class or on an instance.

Ref pylint-dev/pylint#1932. Ref pylint-dev/pylint#2062. The enum.Enum class itself
defines two @DynamicClassAttribute data-descriptors "name" and "value"
which behave differently when looked up on an instance or on the class.
When dealing with inference of an arbitrary instance of the enum class,
e.g. in a method defined in the class body like:

    class SomeEnum(enum.Enum):
        def method(self):
            self.name  # <- here

we should assume that "self.name" is the string name of some enum
member, unless the enum itself defines a "name" member.