improve deprecating modules that moved to stdlib

[vchuravy]

fixes #24832
fixes #24488

[vtjnash]

Seems like we could fix the @deprecate_moved too?

julia> DateTime(1)
ERROR: Base.DateTime has been moved to the standard library package Dates.
Restart Julia and then run `using Dates` to load it.

[vchuravy]

So instead of:

@deprecate_moved DateTime "Dates" true true

@deprecate DateTime (root_module(:DateTime)).DateTime

[vchuravy]

Will address the @deprecate_moved in a different PR later this week, since I would like to land this first.