Render flexible types with enhancement as enhanced in IDE (KT-25622)

Main targets for the fix is completion, parameters info, inlay hints and
override/implement.

Other IDE functions might be affected.

 #KT-24911 Fixed
 #KT-25616 Fixed
 #KT-25622 Fixed

idea/ide-common/src/org/jetbrains/kotlin/idea/util/IdeDescriptorRenderers.kt

@@ -48,6 +48,7 @@ object IdeDescriptorRenderers {
         renderDefaultVisibility = false
         overrideRenderingPolicy = OverrideRenderingPolicy.RENDER_OVERRIDE
         unitReturnType = false
+        enhancedTypes = true
         modifiers = DescriptorRendererModifier.ALL
         renderUnabbreviatedType = false
         annotationArgumentsRenderingPolicy = AnnotationArgumentsRenderingPolicy.UNLESS_EMPTY

idea/ide-common/src/org/jetbrains/kotlin/idea/util/TypeUtils.kt

@@ -37,7 +37,7 @@ fun KotlinType.approximateFlexibleTypes(
         preferStarForRaw: Boolean = false
 ): KotlinType {
     if (isDynamic()) return this
-    return approximateNonDynamicFlexibleTypes(preferNotNull, preferStarForRaw)
+    return unwrapEnhancement().approximateNonDynamicFlexibleTypes(preferNotNull, preferStarForRaw)
 }
 
 private fun KotlinType.approximateNonDynamicFlexibleTypes(