The SF Giants will be paying Tommy La Stella’s $11.5 million salary to be a Mariners’ infielder next season. Think of it as a really delayed trade for Mitch Haniger. The Seattle Mariners signed former Giant Tommy La Stella to a one-year deal, after SF designated La Stella for assignment back in December, and subsequently released him. With the SF Giants signing Mitch Haniger away from Seattle, it’s almost like they swapped La Stella for Haniger, but with the Giants paying the salaries for both players. Farhan Zaidi signed La Stella to an extremely long contract by his standards -…