The Federal Trade Commission on Friday sued PepsiCo in a last-minute blitz of lawsuits before the end of the Biden administration, alleging that the beverage giant forced many consumers to pay higher prices by giving Walmart unfair pricing advantages. The FTC, whose legal filing was sealed, said PepsiCo provided promotional pricing deals to a single “big-box” customer. Walmart was the recipient of those incentives, according to people familiar with the matter.