Make Kexi query parameters also work in COLUMNS section

Port calligra.git's 5c0d3ee52fd:

Kexi query parameters do not work in COLUMNS section, e.g. this won't work ('invalid query' error appears):
SELECT [Param]

The parameters work only in the WHERE section, e.g. SELECT 123 WHERE [Param] = 1

CCBUG:348473

Test Plan:
Test the query in the attached db https://bugs.kde.org/show_bug.cgi?id=348473#c1