Return applied alpha for MixUp (#1572) #1999

Job	Run time
Check Readme is not outdated (3.8)	27s
Check code formatting with ruff and mypy + tests (3.8)	40s
Test and lint (ubuntu-latest, 3.8)	3m 7s
Test and lint (ubuntu-latest, 3.9)	5m 15s
Test and lint (ubuntu-latest, 3.10)	5m 28s
Test and lint (ubuntu-latest, 3.11)	4m 59s
Test and lint (ubuntu-latest, 3.12)	6m 7s
Test and lint (windows-latest, 3.8)	5m 51s
Test and lint (windows-latest, 3.9)	8m 9s
Test and lint (windows-latest, 3.10)	8m 38s
Test and lint (windows-latest, 3.11)	8m 35s
Test and lint (windows-latest, 3.12)	8m 49s
Test and lint (macos-latest, 3.8)	4m 29s
Test and lint (macos-latest, 3.9)	8m 8s
Test and lint (macos-latest, 3.10)	7m 26s
Test and lint (macos-latest, 3.11)	8m 30s
Test and lint (macos-latest, 3.12)	8m 12s
	1h 42m 50s

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