[DPE-6752] Port over postgresql charm lib v1 to support predefined roles

[shayancanonical]

Issue

With the introduction of predefined roles in the VM operator, we introduce a lot of breaking changes in the postgresql charm lib (which we most likely do not want to backport to PG 14 branches).

Solution

Bump postgresql charm lib changes on charm lib v1

TODO

Add unit tests and fix existing unit tests

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 73.74%. Comparing base (1c90b97) to head (7417885).

Additional details and impacted files

@@           Coverage Diff            @@
##           16/edge     #956   +/-   ##
========================================
  Coverage    73.74%   73.74%           
========================================
  Files           12       12           
  Lines         3554     3554           
  Branches       509      509           
========================================
  Hits          2621     2621           
  Misses         738      738           
  Partials       195      195           

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