Refresh connection resolver for models after switching database and fix cache prefixes not being updated

[AlexVanderbist]

Refresh connection resolver for models after switching database

Model::$resolver contains a db instance with a database name. After switching to a different database, the db instance in the Model::$resolver should also be updated to the newly configured db instance. This fixes route model binding on Laravel Octane.

Fix cache prefixes not being updated

Simply calling Cache::forgetDriver() isn't enough to update cache prefixes everywhere. The CacheManager also keeps a copy of the old config in cache and the Cache facade itself keeps an old copy of the CacheManager. All of these should be cleared and forgotten after switching cache configs.