Ambiguity with `Base` on nightly.

[MasonProtter]

Noticed this in an upstream CI run https://github.com/JuliaTesting/ReferenceTests.jl/actions/runs/19192807846/job/54869573255:

Test Failed at /home/runner/work/ReferenceTests.jl/ReferenceTests.jl/test/runtests.jl:26
  Expression: isempty(ambs)
   Evaluated: isempty(Tuple{Method, Method}[(setindex!(A::Base.ReinterpretArray{var"#s4", N, var"#s3", P, true} where {var"#s4"<:ColorTypes.RGBX, var"#s3"<:Number, P<:(SubArray{T, N, P, I} where {T, N, P, I<:Tuple})}, val::ColorTypes.AbstractRGB, i::Vararg{Int64, N}) where N @ ImageCore ~/.julia/packages/ImageCore/0ilgc/src/colorchannels.jl:44, setindex!(a::Base.ReinterpretArray{T, 0, S, A, true} where {S, A<:(AbstractArray{S})}, v) where T @ Base reinterpretarray.jl:560)])

That is, there's a method in ImageCore/src/colorchannels.jl:44 that's ambiguous with a method in base/reinterpretarray.jl:560