[WIP] Support all CombinedLoader modes in prediction loop

[katzkowski]

What does this PR do?

Fixes (doesn't close) #16830 for PredictionLoop

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[Borda]

@katzkowski could you pls check the merge conflists? 🐰

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GitGuardian id	Secret	Commit	Filename
-	Generic High Entropy Secret	78fa3af	tests/tests_app/utilities/test_login.py	View secret
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