add device in HoVerNetNuclearTypePostProcessing and HoVerNetInstanceMapPostProcessing

[KumoLiu]

Fixes # .

Description

Since some operations in post-processing of HoVerNet will convert data to numpy. And most of the time we need to calculate the metric from the model output and label which should both be on CUDA.

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]

/build