Move IC from Gradle to compiler

Reasons for moving:
1. Integration with Kotlin daemon for Gradle.
Gradle bundles Kotlin compiler (kotlin-compiler-embeddable) since Gradle 3.2.
There is no plugin isolation in Gradle, so strange compilation errors/exceptions may happen.
We decided to fix this problem by compiling out-of-process using Kotlin daemon.

Reasons for moving IC to the compiler:
* Better isolation from Gradle process.
* Incremental compilation logic is not scattered across two process and multiple modules.
* Makes it possible to implement standalone CLI IC

.idea/modules.xml

@@ -56,6 +56,7 @@
       <module fileurl="file://$PROJECT_DIR$/idea/idea-repl/idea-repl.iml" filepath="$PROJECT_DIR$/idea/idea-repl/idea-repl.iml" group="ide" />
       <module fileurl="file://$PROJECT_DIR$/idea-runner/idea-runner.iml" filepath="$PROJECT_DIR$/idea-runner/idea-runner.iml" group="ide" />
       <module fileurl="file://$PROJECT_DIR$/idea/idea-test-framework/idea-test-framework.iml" filepath="$PROJECT_DIR$/idea/idea-test-framework/idea-test-framework.iml" group="ide" />
+      <module fileurl="file://$PROJECT_DIR$/compiler/incremental-compilation-impl/incremental-compilation-impl.iml" filepath="$PROJECT_DIR$/compiler/incremental-compilation-impl/incremental-compilation-impl.iml" />
       <module fileurl="file://$PROJECT_DIR$/compiler/preloader/instrumentation/instrumentation.iml" filepath="$PROJECT_DIR$/compiler/preloader/instrumentation/instrumentation.iml" group="compiler/cli" />
       <module fileurl="file://$PROJECT_DIR$/compiler/ir/ir.ir2cfg/ir.ir2cfg.iml" filepath="$PROJECT_DIR$/compiler/ir/ir.ir2cfg/ir.ir2cfg.iml" group="compiler/ir" />
       <module fileurl="file://$PROJECT_DIR$/compiler/ir/ir.psi2ir/ir.psi2ir.iml" filepath="$PROJECT_DIR$/compiler/ir/ir.psi2ir/ir.psi2ir.iml" group="compiler/ir" />