[MISC] Don't set secrets until db is set

[dragomirp]

Port of https://github.com/canonical/pgbouncer-operator/pull/373

• Update libs
• Removes an OPS import warning
• Fixes wrong emission of database_created due to creating the secret before the requirer sets the requested database (data-integrator)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.79%. Comparing base (56f5cc1) to head (50575ce). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #433 +/- ## ========================================== + Coverage 71.69% 71.79% +0.10% ========================================== Files 8 8 Lines 1279 1280 +1 Branches 242 243 +1 ========================================== + Hits 917 919 +2 Misses 276 276 + Partials 86 85 -1 ```

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