Find usages: only collect those descriptors which resolve to callables

Fix failing test on the buildserver
Shared incremental compilation tests. For running locally and on teamcity.
JS backend: minor improve in NamePredicate: replace list with set
JS backend: convert NumberConversionFIF to Kotlin
JS backend: refactoring support for binary intrinsic operations
JS backend: fix KT-5772 wrong code generated when <,<=,>,>= are used with explicit Comparable type

#KT-5772 Fixed
JS backend: tests for KT-5772