cmd/go: "get toolchain@latest" should ignore release candidates [1.24 backport] #74821
Description
@matloob requested issue #74786 to be considered for backport to the next 1.24 minor release.
@gopherbot please backport 1.24 1.25
I think we should backport this into 1.24. It's too late to get it into 1.25.0 but we should backport it into 1.25.1.