`ConvertBoundingBoxFormat` should support `inplace`

[NicolasHug]

The functional does support inplace:

vision/torchvision/transforms/v2/functional/_meta.py

Lines 200 to 205 in f709766

	def convert_bounding_box_format(
	inpt: torch.Tensor,
	old_format: Optional[BoundingBoxFormat] = None,
	new_format: Optional[BoundingBoxFormat] = None,
	inplace: bool = False,
	) -> torch.Tensor:

But for some reason the class doesn't. I don't remember if there was any limitation to this, but we should try.

CC @AntoineSimoulin