return_y -> return_outputs + related updates #883

Job	Run time
Py3.10; no Slycot; no Pandas; no CVXOPT	5m 59s
Py3.10; no Slycot; no Pandas; conda CVXOPT	6m 28s
Py3.10; conda Slycot; no Pandas; no CVXOPT	6m 23s
Py3.10; conda Slycot; no Pandas; conda CVXOPT	6m 10s
Py3.12; no Slycot; no Pandas; no CVXOPT	6m 44s
Py3.12; no Slycot; no Pandas; conda CVXOPT	6m 58s
Py3.12; conda Slycot; no Pandas; no CVXOPT	7m 1s
Py3.12; conda Slycot; no Pandas; conda CVXOPT	7m 15s
Py3.12; conda Slycot; conda Pandas; conda CVXOPT ; QtAgg	7m 55s
Finalize parallel coveralls	3s
	1h 0m 56s

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