Move ArrayColumnSchema and StructuredColumnSchema to db

[Tigrov]

Related PR

• Move ArrayColumnSchema and StructuredColumnSchema from db-pgsql db#882

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues	-

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.72%. Comparing base (3e1cbfb) to head (ba8fe37).
Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #363      +/-   ##
============================================
+ Coverage     99.41%   99.72%   +0.31%     
+ Complexity      294      246      -48     
============================================
  Files            27       26       -1     
  Lines           849      738     -111     
============================================
- Hits            844      736     -108     
+ Misses            5        2       -3     

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