v3.241121

Brings in compatibility with recent CMSSW using python 3.12 (thanks to @smuzaffar )

Also a small extra diagnostics to prevent failures after submissions.

What's Changed

• cred in myproxy must be valid for 5 days. Fix #5331 by @belforte in #5349
• Python3.12 support: Use importlib instead of deprecated imp module by @smuzaffar in #5350

Full Changelog: v3.241107...v3.241121