K2: Fix false-positive OVERLOAD_RESOLUTION_AMBIGUITY

It's been introduced in the previous commit
("K2: Simplify handling mixed smartcast vs. original candidates")

Because previously, it was assumed wrongly that each next level of
ConeCallConflictResolver filter out the candidates that are 100% less
applicable/specific, but the main one (ConeOverloadConflictResolver)
either leaves the single candidate or the whole same set, thus at
FilteringOutOriginalInPresenceOfSmartCastConeCallConflictResolver
we've got 4 candidates only two of which we might filter out.

compiler/fir/java/src/org/jetbrains/kotlin/fir/resolve/calls/jvm/JvmCallConflictResolverFactory.kt

@@ -7,7 +7,10 @@ package org.jetbrains.kotlin.fir.resolve.calls.jvm
 
 import org.jetbrains.kotlin.fir.NoMutableState
 import org.jetbrains.kotlin.fir.resolve.BodyResolveComponents
-import org.jetbrains.kotlin.fir.resolve.calls.*
+import org.jetbrains.kotlin.fir.resolve.calls.ConeCallConflictResolverFactory
+import org.jetbrains.kotlin.fir.resolve.calls.ConeCompositeConflictResolver
+import org.jetbrains.kotlin.fir.resolve.calls.ConeIntegerOperatorConflictResolver
+import org.jetbrains.kotlin.fir.resolve.calls.ConeOverloadConflictResolver
 import org.jetbrains.kotlin.fir.resolve.inference.InferenceComponents
 import org.jetbrains.kotlin.fir.types.typeContext
 import org.jetbrains.kotlin.resolve.calls.results.TypeSpecificityComparator
@@ -21,12 +24,14 @@ object JvmCallConflictResolverFactory : ConeCallConflictResolverFactory() {
         transformerComponents: BodyResolveComponents
     ): ConeCompositeConflictResolver {
         val specificityComparator = JvmTypeSpecificityComparator(components.session.typeContext)
+        // NB: Please, be aware that adding might not necessarily help you because ConeOverloadConflictResolver doesn't just filter out
+        // less specific candidates, but leave the set the same if there are more than one same-specifity candidates.
+        // Thus, in that case, your new ConeCallConflictResolver might get all the candidates in that case.
         return ConeCompositeConflictResolver(
             ConeOverloadConflictResolver(specificityComparator, components, transformerComponents),
             ConeEquivalentCallConflictResolver(specificityComparator, components, transformerComponents),
             JvmPlatformOverloadsConflictResolver(components.session),
             ConeIntegerOperatorConflictResolver,
-            FilteringOutOriginalInPresenceOfSmartCastConeCallConflictResolver
         )
     }
 }