Update plotting recipe to support Plots 1.10.0

[omus]

Attempts to eliminate the plotting warnings we see during testing:

┌ Warning: Indices Base.OneTo(33) of attribute `markeralpha` does not match data indices 1:32.
└ @ Plots ~/.julia/packages/Plots/rz1WP/src/utils.jl:141
┌ Info: Data contains NaNs or missing values, and indices of `markeralpha` vector do not match data indices.
│ If you intend elements of `markeralpha` to apply to individual NaN-separated segments in the data,
│ pass each segment in a separate vector instead, and use a row vector for `markeralpha`. Legend entries
│ may be suppressed by passing an empty label.
│ For example,
└     plot([1:2,1:3], [[4,5],[3,4,5]], label=["y" ""], markeralpha=[1 2])

This PR is responsible for the above warning.

A quick example that generates the warnings is:

plot([1, 3, NaN, 2, 5, NaN], [1, 1, NaN, 2, 2, NaN], markershape=[:vline, :vline, :none, :vline, :none, :none], markeralpha=[1, 1, 0, 1, 0, 0])

and the equivalent plot without the warnings:

plot([[1, 3], [2, 5]], [[1, 1], [2, 2]], markershape=permutedims([[:vline, :vline], [:vline, :none]]), markeralpha=permutedims([[1, 1], [1, 0]]))

Unfortunately, this approach doesn't work for TimeTypes so I've reported this as an issue against Plots:

• [BUG] Failure to plot TimeTypes as series JuliaPlots/Plots.jl#4777