Alec Baldwin has admitted he once called Sir Paul McCartney an “a–hole”. The 66-year-old ‘Glengarry Glen Ross’ actor – who had criminal charges against him dropped in April over the 2021 shooting death of cinematographer Halyna Hutchins, 42, on the set of his neo-western movie ‘Rust’ – said he swore at The Beatles icon, 81, when he realised he was in top shape and great at yoga. He told the ‘Our Way with Paul Anka and Skip Bronson’ podcast: “I used to take a yoga class with Lorne (Michaels), John Eastman, who’s Paul’s brother in-law, John Alexander, the painter – Lorne and I, there were five o…