[DPE-6033] Preload shared libs on normal PG start

[dragomirp]

Issue

psycopg errors out after upgrade due to shared_preload_libraries directive missing in Patroni's postgresql.parameters config

Solution

• Add shared_preload_librariestopostgresql.parameters` config
• Add resources to primary label upgrade tests

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.46%. Comparing base (c5e6100) to head (c50343a).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #774   +/-   ##
=======================================
  Coverage   75.46%   75.46%           
=======================================
  Files          12       12           
  Lines        3118     3118           
  Branches      476      476           
=======================================
  Hits         2353     2353           
  Misses        622      622           
  Partials      143      143           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests