Over the next few weeks, Silver Lake is set to complete one of the biggest private equity deals of the year when it, along with and Canada Pension Plan investment board, acquires Qualtrics, the experience management platform, for $12.5 billion.  Qualtrics has a strong Irish connection and the sale coincides with the opening of its new EMEA headquarters on Clarendon Street, Dublin 2. Costello House has capacity for 500 staff and includes a new innovation hub for Artificial Intelligence development, plus an “executive briefing breakout” facility where the company plans on bringing clients for strategy days to turn them into…