[NPUW] Fix for Whisper model with transformers v5 (#35551)
### Details:
Update pass for adding attention mask for Whisper decoder model
(AttentionMaskInput) as pattern has changed after transformers update on
newer version (v5).
### AI Assistance:
- *AI assistance used: no *
- *If yes, summarize how AI was used and what human validation was
performed (build/tests/manual checks).*
