Broadcasts over StepRange of Date/DateTime materialize to vectors

[artemsolod]

I believe datetime arithmetic broadcasts over ranges of Date/DateTime can avoid being materialized to vectors which is currently the case:

julia> using Dates
julia> (0:5:10) .+ 1 # no vector created
1:5:11
julia> (Date(2024, 1, 1):Day(1):Date(2024, 1, 2)) .+ Day(1) # StepRange{Date, Day}  yields Vector{Date}
2-element Vector{Date}:
 2024-01-02
 2024-01-03
julia> (DateTime(2024, 1, 1):Day(1):DateTime(2024, 1, 2)) .+ Second(1) # similarly for DateTime
2-element Vector{DateTime}:
 2024-01-01T00:00:01
 2024-01-02T00:00:01

julia installed with juliaup:

julia> versioninfo()
Julia Version 1.10.2
Commit bd47eca2c8a (2024-03-01 10:14 UTC)
Build Info:
  Official https://julialang.org/ release
Platform Info:
  OS: Linux (x86_64-linux-gnu)