Deprecate use of NaiveDateTime in APIs

[tustvold]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

NaiveDateTime is hard to use correctly, and it is very easy to introduce subtle bugs.

https://github.com/chronotope/chrono/releases/tag/v0.4.35 deprecated a large number of methods on NaiveDateTime for this reason, we should follow their example

Describe the solution you'd like

I would like to alter these methods to return DateTime<Utc>

Describe alternatives you've considered

Additional context

[Michael-J-Ward]

@tustvold - Do you want to alter the methods directly or do a deprecate-then-remove cycle?

I started some work on this in #5684 and would like to continue it if you're interested.

[ByteBaker]

@tustvold @alamb I could resume work on this with some direction.