PR CPU tests

Bump mosaicml/pytorch images to use new mosaicml/pytorch images with updated ubuntu 22.04 #8256

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Run time

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Job	Run time
cpu-3.11-2.3	16m 11s
cpu-3.11-2.4	13m 42s
cpu-3.11-2.5	13m 18s
cpu-doctest	5m 24s
Coverage Results / coverage	8s
	48m 43s