Remove pg dependency from CLI

[evgeniy-r]

✓ Checklist:

• This PR has been added to CHANGELOG.md (at the top of the list);
• Tests for the changes have been added (for bug fixes / features).

[codecov-commenter]

Codecov Report

Merging #123 (0587cd9) into main (30e4fbf) will decrease coverage by 0.18%.
The diff coverage is 67.21%.

@@            Coverage Diff             @@
##             main     #123      +/-   ##
==========================================
- Coverage   79.26%   79.08%   -0.19%     
==========================================
  Files          51       52       +1     
  Lines        3120     3131      +11     
==========================================
+ Hits         2473     2476       +3     
- Misses        647      655       +8     

Impacted Files	Coverage Δ
cli/pg_datanymizer/src/app.rs	50.00% <0.00%> (-17.00%)	⬇️
datanymizer_dumper/src/postgres/connector.rs	77.35% <77.35%> (ø)

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