Return applied alpha for MixUp #1997

Job	Run time
Check code formatting with ruff and mypy + tests (3.8)	43s
Test and lint (ubuntu-latest, 3.8)	3m 10s
Check Readme is not outdated (3.8)	33s
Test and lint (ubuntu-latest, 3.9)	5m 18s
Test and lint (ubuntu-latest, 3.10)	4m 56s
Test and lint (ubuntu-latest, 3.11)	5m 1s
Test and lint (ubuntu-latest, 3.12)	5m 37s
Test and lint (windows-latest, 3.8)	5m 23s
Test and lint (windows-latest, 3.9)	9m 14s
Test and lint (windows-latest, 3.10)	8m 11s
Test and lint (windows-latest, 3.11)	8m 52s
Test and lint (windows-latest, 3.12)	8m 21s
Test and lint (macos-latest, 3.8)	5m 10s
Test and lint (macos-latest, 3.9)	7m 47s
Test and lint (macos-latest, 3.10)	8m 6s
Test and lint (macos-latest, 3.11)	7m 59s
Test and lint (macos-latest, 3.12)	8m 17s
	1h 42m 38s

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