Introduce warnings reporting by missed constraints because of incorrect optimization in the constraints processor

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/model/KotlinCallDiagnostics.kt

@@ -21,6 +21,7 @@ import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
 import org.jetbrains.kotlin.descriptors.ValueParameterDescriptor
 import org.jetbrains.kotlin.resolve.calls.components.CallableReferenceCandidate
 import org.jetbrains.kotlin.resolve.calls.inference.model.ConstraintSystemError
+import org.jetbrains.kotlin.resolve.calls.inference.model.NewConstraintError
 import org.jetbrains.kotlin.resolve.calls.tower.CandidateApplicability
 import org.jetbrains.kotlin.resolve.calls.tower.CandidateApplicability.*
 import org.jetbrains.kotlin.types.TypeConstructor
@@ -279,3 +280,6 @@ val KotlinCallDiagnostic.constraintSystemError: ConstraintSystemError?
 
 fun ConstraintSystemError.asDiagnostic(): KotlinConstraintSystemDiagnostic = KotlinConstraintSystemDiagnostic(this)
 fun Collection<ConstraintSystemError>.asDiagnostics(): List<KotlinConstraintSystemDiagnostic> = map(ConstraintSystemError::asDiagnostic)
+
+fun List<KotlinCallDiagnostic>.filterErrorDiagnostics() =
+    filter { it !is KotlinConstraintSystemDiagnostic || (it.error as? NewConstraintError)?.isWarning != true }

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/model/ResolutionAtoms.kt

@@ -251,7 +251,7 @@ sealed class CallResolutionResult(
             if (error !is NewConstraintError) return@map it
             val lowerType = error.lowerType.safeAs<KotlinType>()?.unwrap() ?: return@map it
             val newLowerType = substitutor.safeSubstitute(lowerType.unCapture())
-            NewConstraintError(newLowerType, error.upperType, error.position).asDiagnostic()
+            NewConstraintError(newLowerType, error.upperType, error.position, error.isWarning).asDiagnostic()
         }
     }