If you haven't started HRT yet and are concerned, the safest option would be to delay starting till after your surgery. As far as I know, there has been no literature regarding blood clot risk after wisdom tooth surgery whilst being on HRT for transgender people.
As with any surgical procedure there is the risk of bruising, swelling, etc. the degree will vary depending on surgeon skill, the severity of the wisdom tooth impaction, and how much work is required to gain access to remove the teeth. I would say that the risk of a clot would be related to the difficulty of the surgery, but regardless, would be quite low, as wisdom tooth surgery generally does not involve work on any major blood vessels so the risk of a major bleed is close to non-existent.
Good luck with it, and make sure you get them all out in one go if you're having it done under a general anaesthetic. It's about a weeks recovery after surgery so if you have them out one at a time, you potentially will lose a month of your life to recovery from wisdom teeth.