feat(schema): add database schema config

[serrovsky]

With this configuration, you can select database schema. This setting could be good when you want to share the same Postgres instance for different clusters validations.

[codecov[bot]]

Codecov Report

Merging #1129 (f76b70a) into main (70a544e) will decrease coverage by 0.60%. The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1129      +/-   ##
==========================================
- Coverage   63.86%   63.26%   -0.61%     
==========================================
  Files          12       12              
  Lines        1882     1900      +18     
==========================================
  Hits         1202     1202              
- Misses        619      637      +18     
  Partials       61       61              

Impacted Files	Coverage Δ
cmd/database.go	0.00% <0.00%> (ø)

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[mozillazg]

@luis-serra-ki Thanks for your contribution!

[chen-keinan]

@luis-serra-ki thank you for the contribution , added a couple of comments

[mozillazg]

@serrovsky-pt Could you please take a look at these new comments? Thanks!