Replace some uses of Array by Vector or Matrix

[fingolfin]

Progress towards issue #56922 by @LilithHafner. Turns out I didn't find many uses of Array{T, 1} or Array{T, 2} in doc or base that were "clearly" in need of being updated to Vector or Matrix.

There are a bunch that can't be changed because they occur before Vector or Matrix are even defined.

There are a couple borderline cases, and I may have overlooked some, but most I looked at felt like "I could change it to Vector or Matrix but I think there is a didactical point in using Array here. E.g. in the definition of struct BitVector <: AbstractArray{Bool, 1}; end I think the context makes it desirable to leave it at that instead of changing it to Vector -- but I admit this is subjective.

There was more in test, though that's perhaps less important.

All in all I think we could close #56922

[LilithHafner]

CI failures look real.

This looks quite reasonable.

Changing tests is much less important and also I wouldn't want to entirely eliminate Array{T, 1} and Array{T, 2} in tests, just for coverage.