feat(datasets) Add pathological partitioner #12436

Job	Run time
Build, test and upload wheel	1m 10s
Strategy / FedMedian	1m 13s
Framework / bare	3m 41s
Strategy / FedTrimmedAvg	1m 10s
Framework / bare-https	1m 18s
Strategy / QFedAvg	1m 11s
Framework / bare-client-auth	51s
Strategy / FaultTolerantFedAvg	1m 12s
Framework / framework-jax	1m 24s
Strategy / FedAvgM	1m 18s
Framework / framework-pytorch	2m 0s
Framework / framework-tensorflow	3m 4s
Strategy / FedAdam	1m 11s
Framework / framework-opacus	2m 11s
Strategy / FedAdagrad	1m 16s
Framework / framework-pytorch-lightning	1m 42s
Strategy / FedYogi	1m 9s
Framework / framework-scikit-learn	2m 3s
Framework / framework-fastai	2m 47s
Framework / framework-pandas	1m 19s
	33m 10s

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