`compute_meandice` and `compute_meaniou` should be `compute_dice` and `compute_iou`

[wyli]

Describe the bug
the basic logic in

MONAI/monai/metrics/meandice.py

Lines 106 to 108 in bc09a4c

	def compute_meandice(
	y_pred: torch.Tensor, y: torch.Tensor, include_background: bool = True, ignore_empty: bool = True
	) -> torch.Tensor:

MONAI/monai/metrics/meaniou.py

Lines 106 to 108 in bc09a4c

	def compute_meaniou(
	y_pred: torch.Tensor, y: torch.Tensor, include_background: bool = True, ignore_empty: bool = True
	) -> torch.Tensor:

don't include any metrics reduction logic, so their names shouldn't contain 'mean'.

[myron]

I think either name is okay, and compute_dice seems like a little bit semantically better option here, but both are okay

but we should consider extending this function as in here https://github.com/Project-MONAI/MONAI/pull/5379/files#diff-df0f76defe29c2c91286e52334ead7a0f1f54e392d1a3e8280e2e714800dc4cbR158

or refactoring dice overall #5378

[wyli]

these are function elements at a 'low level', and have nothing to do with the ticket you mentioned @myron, let's not make cross-references if they are unrelated.