Add upsertWithReturningPks() method

[Tigrov]

Related PRs:

• Implement DMLQueryBuilder::upsertWithReturningPks() method db-sqlite#356
• Implement Command::upsertWithReturningPks() method db-mysql#394
• Implement DMLQueryBuilder::upsertWithReturningPks() method db-pgsql#408
• Implement DMLQueryBuilder::upsertWithReturningPks() method db-mssql#361
• Refactor Command::insertWithReturningPks() method db-oracle#324

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌
Fixed issues	#796

[codecov]

Codecov Report

Attention: Patch coverage is 93.10345% with 2 lines in your changes missing coverage. Please review.

Project coverage is 99.04%. Comparing base (2a20236) to head (9938822).

Files with missing lines	Patch %	Lines
src/Driver/Pdo/AbstractPdoCommand.php	83.33%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #973      +/-   ##
============================================
- Coverage     99.08%   99.04%   -0.05%     
- Complexity     1630     1640      +10     
============================================
  Files            99       99              
  Lines          4063     4086      +23     
============================================
+ Hits           4026     4047      +21     
- Misses           37       39       +2     

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[vjik]

Need info in changelog/upgrade