(1) Move `add_breadcrumb` and session function from Hub to Scope #3065

Job	Run time
gevent pinned, python 3.6, ubuntu-20.04	3m 21s
gevent pinned, python 3.7, ubuntu-20.04	3m 20s
gevent py27, python 2.7	2m 6s
gevent pinned, python 3.8, ubuntu-20.04	3m 11s
gevent pinned, python 3.9, ubuntu-20.04	3m 21s
gevent pinned, python 3.10, ubuntu-20.04	3m 15s
gevent pinned, python 3.11, ubuntu-20.04	3m 15s
All gevent tests passed or skipped	1s
	21m 50s

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