[Enhancement]Replace numpy ascontiguousarray with torch contiguous to speed-up #2604
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Motivation
Original motivation was after MMDetection PR #9533
With several experiments I found out that if a ndarray is contiguous, numpy.transpose + torch.contiguous perform better, while if not, then use numpy.ascontiguousarray + numpy.transpose
Modification
Replace numpy.ascontiguousarray with torch.contiguous in PackSegInputs