“House of Gucci” (2021. 155 minutes. R) — Ridley Scott’s scathing potboiler features Lady Gaga as the “Black Widow “, Lady Patrizia Reggiani Gucci, who became the center of a 1990s scandal involving lust, greed, decadence, fashion . . . and murder. Co-starring Adam Driver, Al Pacino, Jared Leto, Jeremy Irons and Salma Hayek.