`getrowval` and `getnzval` are defined on SparseMatrixCSC but not on SparseVector

[rayegun]

rowval is defined on both, but curiously getrowval is not. I'm not sure exactly why we have two identical accessor functions.

[ViralBShah]

Some discussion: JuliaLang/julia#33041

[rayegun]

It seems like those changes just rotted more than anything correct? I'll comb through them.

[ViralBShah]

I believe so. The main issue is to see how many packages use the APIs (whichever one we want to delete). I think you can search on juliahub.com to get a quick check.

[rayegun]

For now I just intend to fill in the missing functions. That means we have two functions that do the same things, but we're just extending the matrix function to cover vectors as well.

Then we can put deleting one of them in a SparseArrays.jl v2.0 list.