[BUG] x509_v2 CRL creation confuses local timezone as UTC

[lkubb]

Description
When creating a CRL with the x509_v2 modules and having a system timezone other than UTC, last_update and next_update are set wrong (they are set via datetime.today instead of datetime.utcnow / datetime.now(tz=timezone.utc).

Setup
irrelevant

Steps to Reproduce the behavior

• set system timezone to non-UTC
• create CRL with salt-call x509.create_crl [...] path=$(pwd)/crl.pem
• salt-call x509.read_crl $(pwd)/crl.pem

Expected behavior
last_update shows current time, next_update current time + days_valid

Screenshots
last_update shows current time + UTC offset, same for next_update

Versions Report
present in all release branches and master

Additional context
Not my own finding, stumbled over a report here: https://groups.google.com/g/salt-users/c/IUUflZz7daQ

[lkubb]

Closed by #65838