Accept timedelta as type whenever working with time

[caniko]

I was looking at CookieTransport, and was wondering why we are limited to integers for defining cookie_max_age. I wish we could use datetime.timedelta at least as an alternative.

There are some other time-defining variables where this also makes sense to me.

Looking more into this, I can see that this is also the way starlette operates, the upstream culture is almost always conservative 😆 This is python, we have abstractions for everything! I made a poll on the Starlette side