community/py3-tzlocal: move from testing

To help keep some history, an upgrade of this aport to 4.2 was reverted
due to the not yet packaged runtime dependency 'pytz_deprecation_shim'.

Reference issue alpine/aports#13687 and MR alpine/aports!33130

testing/py3-tzlocal/APKBUILD → community/py3-tzlocal/APKBUILD

 # Maintainer: prspkt <prspkt@protonmail.com>
 pkgname=py3-tzlocal
-pkgver=2.1
+pkgver=2.1 # Read about API change & pytz_deprecation_shim before upgrade!
 pkgrel=3
 pkgdesc="Python tzinfo object for the local timezone"
 url="https://github.com/regebro/tzlocal"