DPE-8470 Bump patroni from 3.2.2 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 64.51%. Comparing base (f9855c2) to head (d3b0dfd).
⚠️ Report is 1 commits behind head on 16/edge.

❌ Your project status has failed because the head coverage (64.51%) is below the target coverage (70.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff            @@
##           16/edge    #1198   +/-   ##
========================================
  Coverage    64.51%   64.51%           
========================================
  Files           17       17           
  Lines         4337     4337           
  Branches       671      671           
========================================
  Hits          2798     2798           
  Misses        1357     1357           
  Partials       182      182           

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