Usually, I prefer for my avocado and tequila to keep a respectable distance. They may go to the same party, but they have different friends. One kicks it hardcore with tortilla chips, while the other is best buds with shot glasses, and limes.  So, when I heard that there was an avocado margarita being served at Cantina Laredo I immediately thought a line was crossed? What were these two doing canoodling together?  Happily this is a love affair that works. Recently launched at all Cantina Laredo’s, I decided to test out this new concoction at the 32-year-old Addison location. The margarita is made with 1800 Añejo Tequila with Midori Melon…