Minor. Use getExpectedType as util function for parameter type calculation

For almost all cases this change do nothing, because if parameter isn't
vararg, then both methods (FlatSignature.argumentValueType &
getExpectedType) return same value. Moreover if it is vararg parameter
and spread operator is not used, then results will be the same.
We can observe difference only when spread operator used
and when we compare two candidates corresponding parameters
for both spread arguments should be vararg parameters.
I.e. old way compares: Int vs String
new way compares: Array<out Int> vs Array<out String>.

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/NewOverloadingConflictResolver.kt

@@ -19,9 +19,10 @@ package org.jetbrains.kotlin.resolve.calls.components
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.resolve.calls.inference.components.ConstraintInjector
 import org.jetbrains.kotlin.resolve.calls.inference.components.SimpleConstraintSystemImpl
-import org.jetbrains.kotlin.resolve.calls.model.*
+import org.jetbrains.kotlin.resolve.calls.model.KotlinCallArgument
+import org.jetbrains.kotlin.resolve.calls.model.KotlinResolutionCandidate
+import org.jetbrains.kotlin.resolve.calls.model.ResolvedCallArgument
 import org.jetbrains.kotlin.resolve.calls.results.FlatSignature
-import org.jetbrains.kotlin.resolve.calls.results.FlatSignature.Companion.argumentValueType
 import org.jetbrains.kotlin.resolve.calls.results.OverloadingConflictResolver
 import org.jetbrains.kotlin.resolve.calls.results.TypeSpecificityComparator
 import org.jetbrains.kotlin.types.KotlinType
@@ -59,9 +60,9 @@ class NewOverloadingConflictResolver(
                     numDefaults++
                 } else {
                     val originalValueParameter = originalValueParameters[valueParameter.index]
-                    val parameterType = originalValueParameter.argumentValueType
                     for (valueArgument in resolvedValueArgument.arguments) {
-                        valueArgumentToParameterType[valueArgument] = parameterType
+                        valueArgumentToParameterType[valueArgument] =
+                                valueArgument.getExpectedType(originalValueParameter, candidate.callComponents.languageVersionSettings)
                     }
                 }
             }