E2E

Replace `Fwd/Bwd` with `Message/Context` #6299

Job	Run time
Build, test and upload wheel	1m 24s
Strategy / FedMedian	1m 16s
Framework / bare	2m 48s
Strategy / FedTrimmedAvg	1m 10s
Framework / bare-https	2m 34s
Strategy / QFedAvg	1m 8s
Framework / jax	2m 52s
Strategy / FaultTolerantFedAvg	1m 16s
Framework / pytorch	2m 48s
Strategy / FedAvgM	1m 6s
Framework / tensorflow	2m 51s
Strategy / FedAdam	1m 15s
Framework / tabnet	2m 50s
Strategy / FedAdagrad	1m 8s
Framework / opacus	2m 48s
Strategy / FedYogi	1m 19s
Framework / pytorch-lightning	3m 5s
Framework / mxnet	2m 49s
Framework / scikit-learn	2m 49s
Framework / fastai	2m 49s
Framework / pandas	2m 49s
	44m 54s

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