WL#7201: True bottom-up server parser: refactoring of the INSERT/REPLACE statement

Affects: Parser-Prototype Only   —   Status: Complete   —   Priority: Medium

This WL is intended to refactor INSERT and REPLACE statement-related parser
grammar rules in a pure bottom-up style to make it (grammar) context-independent
for the better maintainability and extendability at the first place.

This WL uses the framework and the methodology of the refactoring from the
WL#7199 "True bottom-up server parser: common framework for the refactoring".

The WL depends on the similar WL#7200 for the SELECT statement since that WL
covers the refactoring of "expr", "subselect" etc common rules.