Hospitalizations have grown across eastern Maine’s largest hospital system in recent weeks, but a growing number of patients are being treated outside the system’s flagship Bangor hospital. The 50 coronavirus hospitalizations reported by Northern Light Health on Thursday marked an increase of 19 since the system saw 31 on Oct. 8, at the time a nadir since the delta variant surge that began over the summer. Of the patients hospitalized on Thursday, 26 were at Eastern Maine Medical Center in Bangor — a number that has held relatively steady for most of October.