[client] Remove outbound chains #9494

Job	Run time
build-cache	14s
test (386)	8m 5s
test_management (386, sqlite)	5m 48s
test (amd64)	9m 47s
test_management (386, postgres)	14m 22s
test_management (386, mysql)	16m 50s
test_management (amd64, sqlite)	5m 27s
api_integration_test (386, sqlite)	5m 23s
benchmark (386, sqlite)	7m 45s
api_benchmark (386, sqlite)	5m 48s
api_integration_test (386, postgres)	14m 3s
test_management (amd64, postgres)	14m 4s
api_benchmark (386, postgres)	8m 22s
benchmark (386, postgres)	10m 33s
api_integration_test (amd64, sqlite)	5m 16s
test_management (amd64, mysql)	16m 30s
api_benchmark (386, mysql)	9m 31s
benchmark (386, mysql)	11m 17s
api_integration_test (amd64, postgres)	13m 38s
api_benchmark (amd64, sqlite)	4m 17s
benchmark (amd64, sqlite)	7m 56s
api_benchmark (amd64, postgres)	6m 46s
benchmark (amd64, postgres)	10m 30s
test_client_on_docker	5m 15s
benchmark (amd64, mysql)	12m 17s
api_benchmark (amd64, mysql)	7m 36s
	3h 57m 20s

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