Merge docs/extract locales to CI workflow #341

Job	Run time
test_make_docker_configuration	28s
context	2s
build	4s
docs_deploy	1s
test_test_addons_versions_files_ratings	6m 18s
check	4m 20s
docs_build	3m 8s
locales	4m 27s
test_amo_lib_locales_and_signing	6m 15s
test_devhub	6m 18s
test_es_tests	6m 16s
test_internal_routes_allowed	5m 16s
test_main	6m 17s
test_needs_locales_compilation	5m 25s
test_reviewers_and_zadmin	6m 17s
test_static_assets	4m 55s
	1h 5m 47s

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