First-line Therapy for metastatic hormone-sensitive Prostate Cancer (mHSPC) Randomized, double-blind Phase III Study of Pembrolizumab (MK-3475) plus Enzalutamide plus ADT compared with Placebo Plus Enzalutamide Plus ADT in Participants with metastatic hormone-sensitive Prostate Cancer (mHSPC) (KEYNOTE-991) - AP 108/19 of the AUO