Edition: Singapore Indonesia Asia US/UK ZURICH :Swiss banks UBS and Pictet said on Wednesday they had suffered a data leak due to a cyber attack on a provider in Switzerland that did not compromise client information, although a report said thousands of UBS workers' data was affected. Swiss newspaper Le Temps said that files containing details of tens of thousands of UBS employees were stolen from the Baar-based business service company Chain IQ, whose website lists KPMG and Mizuho among its