Respect average nthreads in adaptive #11489

Job	Run time
Event File	3s
test (ubuntu-latest, mindeps, queue, ci1)	17m 38s
test (ubuntu-latest, mindeps, queue, not ci1)	14m 48s
test (ubuntu-latest, 3.9, queue, ci1)	28m 6s
test (ubuntu-latest, 3.9, queue, not ci1)	43m 12s
test (ubuntu-latest, 3.10, queue, ci1)	31m 30s
test (ubuntu-latest, 3.10, queue, not ci1)	35m 2s
test (ubuntu-latest, 3.11, queue, ci1)	27m 45s
test (ubuntu-latest, 3.11, queue, not ci1)	37m 20s
test (windows-latest, 3.9, queue, ci1)	41m 50s
test (windows-latest, 3.9, queue, not ci1)	1h 1m 11s
test (windows-latest, 3.10, queue, ci1)	34m 42s
test (windows-latest, 3.10, queue, not ci1)	1h 8m 31s
test (windows-latest, 3.11, queue, ci1)	36m 57s
test (windows-latest, 3.11, queue, not ci1)	1h 1m 36s
test (macos-latest, 3.11, queue, ci1)	43m 0s
test (macos-latest, 3.11, queue, not ci1)	1h 0m 33s
test (ubuntu-latest, 3.9, no_queue, ci1)	25m 33s
test (ubuntu-latest, 3.9, no_queue, not ci1)	46m 36s
test (ubuntu-latest, mindeps, numpy, ci1)	21m 39s
test (ubuntu-latest, mindeps, numpy, not ci1)	18m 10s
	12h 35m 42s

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