*ECB Staff Raises 2022 Inflation Forecast To 6.8% From 5.1%

*ECB Staff Lifts 2023 Inflation Outlook To 3.5% From 2.1%

*ECB Staff Boosts 2024 Inflation Projection To 2.1% From 1.9%

*ECB: High Inflation Is Major Challenge For All

*Euro Drops To 1.0688 Against U.S. Dollar After ECB Decision