False positive in PYI files with ellipsis for PIE796

[Skylion007]

If I define an enum file with ellipsis in PYI files, the linter complains

class CreationMeta(Enum):
    DEFAULT = ...
    IN_CUSTOM_FUNCTION = ...
    MULTI_OUTPUT_NODE = ...
    NO_GRAD_MODE = ...
    INFERENCE_MODE = ...

in a .PYI files, these values are all set to ... to denote that they will be populated in other code, and we only care about what the members of the enum are. This is a pretty common idiom so we may want to explicitly whitelist in our check or at least propose a better fix for PYI files as I am unaware of another way of doing this with a placeholder value for Enum.

[charliermarsh]

Agree, this makes sense to fix IMO.

[Avasam]

In a strict statically type-checked context, I feel this might still be undesirable? But that's more for a rule like PyCQA/flake8-pyi#98