[fix] Use Dynaconf lazy variables insted of re-importing the settings.

[rochacbruno]

Instead of doing from dynaconf import settings which causes the whole settings load to be executed again, it is better to use the support for lazy evaluation and formatting https://www.dynaconf.com/dynamic/#format-token so it is possible to define a variable that is a template to be formed from interpolation with other in settings variables.

So inside a settings file that is managed by dynaconf like:

from dynaconf import settings
FOO = settings.BAR + "/zaz"

It is better to do

FOO = "@format {this.BAR}/zaz"

or if Jinja powers is needed

FOO = "@jinja {{ this.BAR }}/zaz"

This way there is no need to reload all the settings and avoids circular dependencies.

[noissue]