refactor: simplify dataset construction #10401

Job	Run time
Test Python (1, 3.9)	32m 13s
Test Python (1, 3.12)	41m 13s
Test Python (2, 3.9)	32m 43s
Test Python (2, 3.12)	36m 43s
Test Python (3, 3.9)	32m 45s
Test Python (3, 3.12)	38m 26s
Test Python (4, 3.9)	31m 57s
Test Python (4, 3.12)	38m 32s
Test Python (5, 3.9)	31m 59s
Test Python (5, 3.12)	38m 20s
Test Python (6, 3.9)	30m 35s
Test Python (6, 3.12)	35m 48s
Combine and update integration test durations (3.9)	5s
Combine and update integration test durations (3.12)	9s
Pass testing Python	3s
	7h 1m 31s

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