Sandra Bullock doesn’t seem to have many glamorous costume changes in her Boston comedy “The Heat.” Based on what we’ve seen her wearing during the shoot around town, she spends the movie looking a lot like her character in the first half of “Miss Congeniality.” Bullock was spotted in town in yet another simple button-down-and-slacks ensemble on her way to her trailer on Friday. Word is that “The Heat,” directed by Paul Feig of “Bridesmaids,” had a wrap party at Scholars Boston Bistro on Sunday night.