Check city granary more than once

[jwrober]

Is your feature request related to a problem? Please describe.
A city can only grow one size larger per turn, but if the granary still has enough food in it to grow, it still won't

Describe the solution you'd like
Add a loop check to the code that checks for growth during turn change so a city could grow more than once per turn change,

Describe alternatives you've considered
Was thinking an effect, but the code would have to change anyway. So an effect + code change might also work so ruleset modders have the option.

Additional context
part of a discussion in a new chaos rules channel on Discord https://discord.com/channels/378908274113904641/1304179368825720943