Katy Perry is spilling the tea on what led to her brief split and reconciliation with Orlando Bloom. RadarOnline.com can reveal the pop star called things off with her now-fiancé because the Pirates of the Caribbean actor, fresh off a vow of celibacy, wanted a more serious commitment than she was ready for at the time. The Never Really Over singer had a change of heart after “a really tough year” and credited a week-long personal growth retreat with helping bring the pair back together. Perry, 39, and Bloom, 47, met “over an In-N-Out burger” at a Golden Globes afterparty and quickly struck up …