E2E

Make `flower-client` HTTPS by default #4827

Job	Run time
Build, test and upload wheel	1m 22s
Strategy / FedMedian	1m 6s
Framework / bare	1m 34s
Strategy / FedTrimmedAvg	1m 7s
Framework / bare-https	1m 25s
Strategy / QFedAvg	1m 10s
Framework / jax	4m 38s
Strategy / FaultTolerantFedAvg	1m 9s
Framework / pytorch	2m 38s
Strategy / FedAvgM	1m 6s
Framework / tensorflow	3m 0s
Strategy / FedAdam	1m 11s
Strategy / FedAdagrad	1m 18s
Framework / tabnet	2m 35s
Strategy / FedYogi	1m 14s
Framework / opacus	2m 40s
Framework / pytorch-lightning	2m 30s
Framework / mxnet	1m 36s
Framework / scikit-learn	2m 13s
Framework / fastai	3m 37s
Framework / pandas	1m 31s
	40m 40s

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