LAS VEGAS — Mark Cuban lost his starting shooting guard to the Knicks without an opportunity for a final offer, but the Mavericks owner said he’s thrilled for Jalen Brunson and took the high road when asked about accusations of New York’s tampering. “It really wasn’t about the amount of money,” Cuban told the New York Daily News and another New York outlet from Summer League. “We really didn’t get a chance to make an offer. It was Jalen’s choice. And I understand it. He knew those guys his entire life. He grew up there. It makes perfect sense.” Although it’s not yet official — and a source sai…