SCIM: implement Groups #3525

Job	Run time
build_and_test (3.11, 22.x, :lint:python:client:common:smoke:stubs:)	4m 50s
build_and_test (3.11, 22.x, :server-1-of-2:)	6m 19s
build_and_test (3.11, 22.x, :server-2-of-2:)	11m 56s
build_and_test (3.11, 22.x, :gen-server:)	6m 0s
build_and_test (3.11, 22.x, :nbrowser-^[A-D]:)	11m 21s
build_and_test (3.11, 22.x, :nbrowser-^[E-L]:)	9m 51s
build_and_test (3.11, 22.x, :nbrowser-^[M-N]:)	12m 5s
build_and_test (3.11, 22.x, :nbrowser-^[O-R]:)	5m 17s
build_and_test (3.11, 22.x, :nbrowser-^[^A-R]:)	7m 17s
build_and_test (:lint:python:client:common:smoke:, 22.x, 3.10)	4m 50s
candidate	0s
	1h 19m 46s

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