* Add gas override boost, mici boost bar, and Rivian maximum set speed
* Refactor acceleration boost and gate accumulation on model limit
* Fade acceleration boost with model acceleration
* Limit boost buildup per gas override
* Latch boost eligibility before gas override
* Move model limiting check into AccelBoost
* Use DT_MDL directly in AccelBoost
* Clarify acceleration boost state names
* Scale acceleration boost by speed instead of decaying it
* Enable Experimental Mode by default
* Scale boost buildup with the application speed ramp
* Fix boost serialization and model-limit eligibility
* Remove boost UI and Experimental Mode default changes
* Combine boost update and application
Original-upstream-commit: ab8c84c3989bab34969d83e78c5fad3ee5b95112
Upstream: https://github.com/commaai/openpilot/commit/ab8c84c3989bab34969d83e78c5fad3ee5b95112
Harald Schäfer