Bostonians have someone to root for in the new season of “Survivor.” Needham mom and pilates instructor Trish Hegarty will be competing — and conniving — on “Survivor: Cagayan,” according to CBS. Hegarty, a 48-year-old trainer at Barre None Pilates, says it’s been a goal of hers to be on the show. “From the birth of ‘Survivor,’ everyone has told me I would be the best survivor ‘Survivor’ ever had,” she says in her cast bio. We’ll see about that. The 28th edition of “Survivor” was filmed in a province in the Philippines. The new season premieres Feb. 6.