A Novel Method for the Synthesis of 2(3H)‐Benzimidazolones, 2(3H)‐Benzoxazolone, and 2(3H)‐Benzothiazolone via In Situ Generated Ortho Substituted Benzoic Acid Azides: Application of Ammonium Azide and Vilsmeier Complex for Acid Azide Generation