Deprecate Dice from classification and re-add to segmentation

[SkafteNicki]

What does this PR do?

Going to deprecate the current implementation of dice from the classification domain. It is completely outdated because it was not updated back in v0.11 as all the other classification metrics, mainly due to it in principal being equal to f1 score if we look at the math.
As it is being deprecated a new version is going to be added to the segmentation domain such that we both have dice and generalized dice for that domain. At the same time I make sure the new implementation will fix all issues related to the old implementation:

Fixes #2323
Fixes #2262
Fixes #1602
Fixes #1425

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 🙃

---

📚 Documentation preview 📚: https://torchmetrics--2725.org.readthedocs.build/en/2725/

[codecov]

Codecov Report

Attention: Patch coverage is 87.75510% with 12 lines in your changes missing coverage. Please review.

Project coverage is 69%. Comparing base (421e028) to head (ecdc60a).
Report is 1 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #2725   +/-   ##
======================================
  Coverage      69%     69%           
======================================
  Files         338     340    +2     
  Lines       18352   18448   +96     
======================================
+ Hits        12595   12679   +84     
- Misses       5757    5769   +12