Implement DMLQueryBuilder::upsertWithReturningPks() method

[Tigrov]

Related PR

• Add upsertWithReturningPks() method db#973

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 99.88%. Comparing base (ae45569) to head (1728be9).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #408   +/-   ##
=========================================
  Coverage     99.88%   99.88%           
- Complexity      287      289    +2     
=========================================
  Files            32       32           
  Lines           891      896    +5     
=========================================
+ Hits            890      895    +5     
  Misses            1        1           

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