[DPE-6555] Add read only URIs

[dragomirp]

• Implementing DA158:
  • Always set a read only endpoint
  • Set read-only-uris if client has a recent data-platform-libs
• Update libs

dpl changes PR: canonical/data-platform-libs#206

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 75.12%. Comparing base (ebf4756) to head (6bc4781).

Files with missing lines	Patch %	Lines
src/relations/postgresql_provider.py	60.00%	5 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #875      +/-   ##
==========================================
- Coverage   75.21%   75.12%   -0.09%     
==========================================
  Files          12       12              
  Lines        3187     3200      +13     
  Branches      477      480       +3     
==========================================
+ Hits         2397     2404       +7     
- Misses        643      648       +5     
- Partials      147      148       +1     

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