Bugfix: ignore index + macro combination in classification metrics

[SkafteNicki]

What does this PR do?

Fixes #2441

Before submitting

• [ ] Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• [ ] Did you read the contributor guideline, Pull Request section?
• [ ] Did you make sure to update the docs?
• [ ] Did you write any new necessary tests?

PR review

Anyone in the community is free to review the PR once the tests have passed. If we didn't discuss your PR in Github issues there's a high chance it will not be merged.

Did you have fun?

Make sure you had fun coding 🙃

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📚 Documentation preview 📚: https://torchmetrics--2443.org.readthedocs.build/en/2443/

[Borda]

@SkafteNicki, what is missing here to make it land? :chipmunk:

[DimitrisMantas]

Is this still happening?

[JeroenMandersloot]

Any chance that this will be worked on in the near future?

[Borda]

Any chance that this will be worked on in the near future?

cc: @SkafteNicki

[Borda]

Any chance that this will be worked on in the near future?

do you want to take it over and reopen @SkafteNicki commits as part of your/new PR so you will share contribution? 🦩

[Borda]

@DimitrisMantas @JeroenMandersloot are you interested in taking this over and finishing it? 🦩

[Borda]

@rittik9, would you be interested in finishing this one? 🐰

[rittik9]

Yeah sure I'll give it a try

[Borda]

@SkafteNicki let's finish it or close it? 🐿️