Prepare for importlib.metadata 8 update

[mpurnell1]

As of June 2024, progress was made towards fixing metadata values being None.

Finally, importlib_metadata 8 provides the desired behavior, raising KeyError on a missing key. If you want the KeyError behavior, depend on and use importlib_metadata 8 or later (to be incorporated in Python 3.14).

Originally posted by @jaraco in python/importlib_metadata#371

In preparation for this change, we should not get the attribute directly, but instead explicitly provide a default of None. Doing so would remove a DeprecationWarning, and the fix would be valid through Python 3.14, since providing a default value prevents a KeyError being raised.

I would be happy to submit a PR for this, but I don't quite understand the commit message formatting guidelines.

sentry_sdk/utils.py:1668 current
name = dist.metadata["Name"]

sentry_sdk/utils.py:1668 proposed
name = dist.metadata.get("Name", None)

[sentrivana]

Hey @mpurnell1, thanks for surfacing this. The proposed change sounds good to me. Feel free to submit a PR with it.

Don't worry too much about the commit message, we're not super strict on this. I'd probably go with something like ref(utils): <your commit message>.