Add PyTorch integration tests with FDS #5527

Job	Run time
Build, test and upload wheel	1m 22s
Framework / bare	1m 37s
Framework / bare-https	1m 14s
Strategy / FedMedian	1m 32s
Framework / jax	1m 46s
Strategy / FedTrimmedAvg	1m 11s
Framework / pytorch	2m 42s
Strategy / QFedAvg	1m 6s
Framework / tensorflow	3m 12s
Strategy / FaultTolerantFedAvg	1m 34s
Framework / tabnet	2m 43s
Strategy / FedAvgM	1m 10s
Framework / opacus	2m 42s
Strategy / FedAdam	1m 19s
Framework / pytorch-lightning	2m 36s
Strategy / FedAdagrad	1m 21s
Framework / mxnet	1m 40s
Strategy / FedYogi	1m 6s
Framework / scikit-learn	2m 33s
Framework / fastai	5m 27s
Framework / pandas	1m 42s
	41m 35s

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