Remove AbstractDMLQueryBuilder::getTypecastValue() method

[Tigrov]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues	#767

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.56%. Comparing base (d594a8b) to head (25ae374).

❗ Current head 25ae374 differs from pull request most recent head cd47eaf. Consider uploading reports for the commit cd47eaf to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #836      +/-   ##
============================================
+ Coverage     98.92%   99.56%   +0.64%     
+ Complexity     1323     1321       -2     
============================================
  Files            64       64              
  Lines          3249     3245       -4     
============================================
+ Hits           3214     3231      +17     
+ Misses           35       14      -21     

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