Add missing optimization for `iterate(::LogicalIndex{<:CartesianIndex,<:BitArray})` (#43448)
* make `collect(::LogicalIndex)` faster by call `findall`
* borrow code from findall
borrow code from findall
* Update base/multidimensional.jl
Co-authored-by: Kristoffer Carlsson <kcarlsson89@gmail.com>
Co-authored-by: Kristoffer Carlsson <kcarlsson89@gmail.com>