refactor: use pytest fixtures to reduce repetition in tests #10809

Job	Run time
style	25s
Example scripts (ubuntu-latest / Python 3.12)	13m 46s
Example notebooks (ubuntu-latest / Python 3.12)	19m 58s
Doctests (ubuntu-latest / Python 3.11)	3m 31s
Tests (ubuntu-latest / Python 3.9)	30m 16s
Tests (ubuntu-latest / Python 3.10)	31m 35s
Tests (ubuntu-latest / Python 3.11)	27m 46s
Tests (ubuntu-latest / Python 3.12)	34m 13s
Tests (macos-12 / Python 3.9)	23m 11s
Tests (macos-12 / Python 3.10)	19m 25s
Tests (macos-12 / Python 3.11)	18m 30s
Tests (macos-12 / Python 3.12)	19m 16s
Tests (macos-14 / Python 3.9)	10m 54s
Tests (macos-14 / Python 3.10)	10m 26s
Tests (macos-14 / Python 3.11)	17m 25s
Tests (macos-14 / Python 3.12)	8m 28s
Tests (windows-latest / Python 3.9)	31m 29s
Tests (windows-latest / Python 3.10)	31m 0s
Tests (windows-latest / Python 3.11)	27m 12s
Tests (windows-latest / Python 3.12)	24m 35s
	6h 43m 21s

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