Problem: populate_aip_stored_dates SS command python requirements are not installed

[scollazo]

Expected behaviour

The populate_aip_stored_dates command works

Current behaviour

The command fails with

 < Omitted output>

  File "/src/storage_service/common/management/commands/populate_aip_stored_dates.py", line 15, in <module>
    import pytz
ModuleNotFoundError: No module named 'pytz'

Steps to reproduce

Run the command with:

sudo -u archivematica bash -c " \
    set -a -e -x
    source /etc/default/archivematica-storage-service || \
        source /etc/sysconfig/archivematica-storage-service \
            || (echo 'Environment file not found'; exit 1)
    cd /usr/lib/archivematica/storage-service
    /usr/share/archivematica/virtualenvs/archivematica-storage-service/bin/python manage.py populate_aip_stored_dates
";

Your environment (version of Archivematica, operating system, other relevant details)

SS stable/0.21.x on Ubuntu 22.04

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For Artefactual use:

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[replaceafill]

We dropped the pytz dependency and adjusted the command to use Django's timezone calculation.