A California marketing firm linked to Bud Light’s disastrous tie-up with trans influencer Dylan Mulvaney has fired several top executives as part of a major restructuring, The Post has learned. San Mateo-based Captiv8 — which canned 13 staffers in July after top brass returned from a lavish junket to the French Riviera, as The Post reported — axed 30 employees, roughly 20% of its workforce, in the latest round of layoffs, multiple sources told The Post.