Ambiguous sorting of convex_hull in 2D

[schillic]

convex_hull is supposed to yield the same result in 2D independent of the input sequence, but it does not:

julia> convex_hull([[0.0, 0.0], [0.0, 1.0]])
2-element Vector{Vector{Float64}}:
 [0.0, 0.0]
 [0.0, 1.0]

julia> convex_hull([[0.0, 1.0], [0.0, 0.0]])
2-element Vector{Vector{Float64}}:
 [0.0, 1.0]
 [0.0, 0.0]

Originally posted by @schillic in #3836