* Remove indexHint function

* Fixed build

* Update KeyCondition.cpp

* Update KeyCondition.cpp

In KeyCondition: Fixed execution of inversed predicates for non-strictly monotinic functional index (#9223)

* Tests for functional index

* Fixed execution of inversed predicates in functional index

When non-strictly monotonic functional index is used inverted predicated
may be executed incorrectly, which leads to multiple problems: #8821,
#9034

Revert "CHYT-142: extend KeyCondition interface so that it returns BoolMask"

(cherry picked from commit a6286691)

This reverts commit 2cacc3cf.

Also remove some redundant methods like IsIdentifier() et. al.