Add support for BCEWithLogitsLoss in DiceCELoss

[KumoLiu]

Fixes #6923.

Description

Add support for BCEWithLogitsLoss for single-class.

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• Breaking change (fix or new feature that would cause existing functionality to change).
• New tests added to cover the changes.
• Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
• In-line docstrings updated.
• Documentation updated, tested make html command in the docs/ folder.

[wyli]

Thanks, it looks good to me, for single channel prediction of a binary target, the crossentropyloss doesn't work directly

[wyli]

/build