Make infix modifier diagnostic message more informative (KT-12589)

(cherry picked from commit 2744309)

idea/src/org/jetbrains/kotlin/idea/intentions/AddOperatorModifierIntention.kt

@@ -28,7 +28,7 @@ class AddOperatorModifierIntention : SelfTargetingRangeIntention<KtNamedFunction
     override fun applicabilityRange(element: KtNamedFunction): TextRange? {
         val nameIdentifier = element.nameIdentifier ?: return null
         val functionDescriptor = element.resolveToDescriptor() as? FunctionDescriptor ?: return null
-        if (functionDescriptor.isOperator || !OperatorChecks.checkOperator(functionDescriptor).isSuccess) return null
+        if (functionDescriptor.isOperator || !OperatorChecks.check(functionDescriptor).isSuccess) return null
         return nameIdentifier.textRange
     }
 

idea/src/org/jetbrains/kotlin/idea/intentions/conventionNameCalls/ReplaceContainsIntention.kt

@@ -51,7 +51,7 @@ class ReplaceContainsIntention : SelfTargetingRangeIntention<KtDotQualifiedExpre
         if (!element.isReceiverExpressionWithValue()) return null
 
         val functionDescriptor = getFunctionDescriptor(element) ?: return null
-        if (!functionDescriptor.isOperator || !OperatorChecks.checkOperator(functionDescriptor).isSuccess) return null
+        if (!functionDescriptor.isOperator || !OperatorChecks.check(functionDescriptor).isSuccess) return null
 
         return element.callExpression!!.calleeExpression!!.textRange
     }