Canal Street in Chinatown is once again awash in a sea of illegal vendors hawking knock-off designer bags, electronics and jewelry less than a month after ICE dramatically cleared the area and made arrests. The Post caught dozens of the brazen illicit peddlers on video when they were out in full force — with the holiday season fast approaching — Friday before NYPD cops descended on them, sending the Manhattan scofflaws fleeing. Then Sunday, fewer than two days later, there were as many as 100