vinyl: update recovery context with records written during recovery

During recovery, we may write VY_LOG_CREATE_LSM and VY_LOG_DROP_LSM
records we failed to write before restart (because those records are
written after WAL and hence may not make it to vylog). Right after
recovery we invoke garbage collection to drop incomplete runs. Once
VY_LOG_PREPARE_LSM record is introduced, we will also collect incomplete
LSM trees there (those we failed to build). However, there may be LSM
trees we managed to build but failed to write VY_LOG_CREATE_LSM for.
This is OK as we will retry vylog write, but currenntly it isn't
reflected in the recovery context used for garbage collection. To avoid
purging such LSM trees, let's update the recovery context with records
written during recovery.

Needed for #1653