I actually discussed this issue during my daf yomi shiur on daf ches because it had a personal effect on me.
The Rashba does require hatarah for a neder b’chalom( and also requires charatah!). The Nemukai Yosef also holds this way and states that l’chatchila one should be matir before 10 but b’dieved 3 hedyotim is ok.
The Chasam Sofer states that these shitas only apply to where the dream was to accept a chumra. However, in “Shiuray R’ Shmuel” he disagrees and says its possible that the dream was a message from heaven that he should be mekabel the neder( similar to the malach and Shimshon’s mother) and applies to all dreams.
In any event ,as noted by others above, the halacha does not follow these shitas.
My personal story is this: 17 years ago( June 7) I made a neder during a dream that I would stop smoking. (Hardly surprising since I had been coughing a whole night before falling asleep.) When I awoke, I was about to check the halacha ( which I was pretty sure of) but decided that I would assume the halacha was l’chumra. I went out and bought niccorette gum, and the rest is history.