DPE-8470 Bump snap for Patroni to 3.3.8

[taurus-forever]

Issue

PostgreSQL cluster is not solid with flickering IO environment.
See https://warthogs.atlassian.net/browse/DPE-8470

Solution

Updating snap to deliver the latest Patroni 3.3.8 and enabling strict mode (followup commits).

Checklist

• I have added or updated any relevant documentation.
• I have cleaned any remaining cloud resources from my accounts.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.76%. Comparing base (4066bfb) to head (a0d6535).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1197   +/-   ##
=======================================
  Coverage   75.76%   75.76%           
=======================================
  Files          16       16           
  Lines        4163     4163           
  Branches      629      629           
=======================================
  Hits         3154     3154           
  Misses        789      789           
  Partials      220      220           

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