Update canary semver handling (#62852)
As discussed this updates our canary semver bumping to use `preminor`
instead of `prerelease` to avoid overlap with patches/backports and make
it more clear for users which versions go along together.
x-ref: [slack
thread](https://vercel.slack.com/archives/C04DUD7EB1B/p1709583075769789)
Closes NEXT-2701
