Return applied alpha for MixUp #1994

Job	Run time
Check Readme is not outdated (3.8)	27s
Check code formatting with ruff and mypy + tests (3.8)	42s
Test and lint (ubuntu-latest, 3.8)	3m 21s
Test and lint (ubuntu-latest, 3.9)	5m 19s
Test and lint (ubuntu-latest, 3.10)	5m 9s
Test and lint (ubuntu-latest, 3.11)	5m 15s
Test and lint (ubuntu-latest, 3.12)	5m 55s
Test and lint (windows-latest, 3.8)	5m 27s
Test and lint (windows-latest, 3.9)	8m 32s
Test and lint (windows-latest, 3.10)	9m 58s
Test and lint (windows-latest, 3.11)	8m 10s
Test and lint (windows-latest, 3.12)	8m 32s
Test and lint (macos-latest, 3.8)	4m 31s
Test and lint (macos-latest, 3.9)	7m 4s
Test and lint (macos-latest, 3.10)	6m 40s
Test and lint (macos-latest, 3.11)	6m 56s
Test and lint (macos-latest, 3.12)	8m 11s
	1h 40m 9s

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