[BugFix] Fix SACLoss target_entropy="auto" ignoring action space dime… #7343

Job	Run time
unittests-meltingpot / linux-job	20m 9s
unittests-jumanji (3.10, 12.8) / linux-job	10m 12s
unittests-envpool (3.10, 12.8) / linux-job	10m 22s
unittests-gendgrl (3.10, 12.8) / linux-job	9m 40s
unittests-pettingzoo / linux-job	7m 57s
unittests-brax (3.11, 12.8) / linux-job	13m 37s
unittests-isaaclab (3.10, 12.8) / linux-job	19m 48s
unittests-open_spiel (3.10, 12.8) / linux-job	10m 13s
unittests-minari (3.10, 12.8) / linux-job	8m 25s
unittests-smacv2 (3.10, 12.8) / linux-job	19m 3s
unittests-openx (3.10, 12.8) / linux-job	26m 43s
unittests-vmas (3.10, 12.8) / linux-job	15m 28s
unittests-vd4rl (3.10, 12.8) / linux-job	12m 21s
unittests-chess (3.10, 12.8) / linux-job	11m 2s
unittests-gym (3.9, 12.8) / linux-job	10m 19s
unittests-sklearn (3.10, 12.8) / linux-job	10m 5s
unittests-roboset (3.10, 12.8) / linux-job	13m 48s
unittests-robohive (3.9, 12.8) / linux-job	2h 0m 46s
unittests-unity_mlagents (3.10.12, 12.8) / linux-job	10m 59s
	6h 0m 57s

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