Fix inspection Integer.toString() -> int.toString() reports

compiler/tests-common/tests/org/jetbrains/kotlin/codegen/AbstractLineNumberTest.kt

@@ -110,7 +110,7 @@ abstract class AbstractLineNumberTest : CodegenTestCase() {
             }
 
             override fun visitLineNumber(line: Int, start: Label) {
-                labels2LineNumbers[start] = Integer.toString(line)
+                labels2LineNumbers[start] = line.toString()
             }
         }
     }
@@ -147,7 +147,7 @@ abstract class AbstractLineNumberTest : CodegenTestCase() {
         for (i in lines.indices) {
             val matcher = TEST_LINE_NUMBER_PATTERN.matcher(lines[i])
             if (matcher.matches()) {
-                lineNumbers.add(Integer.toString(i + 1))
+                lineNumbers.add((i + 1).toString())
             }
         }
 

compiler/tests-common/tests/org/jetbrains/kotlin/codegen/ir/AbstractIrLineNumberTest.kt

@@ -54,13 +54,13 @@ abstract class AbstractIrLineNumberTest : AbstractLineNumberTest() {
 
             override fun visitLabel(label: Label) {
                 if (lastLabel != null && !labels2LineNumbers.containsKey(lastLabel) && lastLine >= 0) {
-                    labels2LineNumbers[lastLabel!!] = Integer.toString(lastLine) // Inherited line number
+                    labels2LineNumbers[lastLabel!!] = lastLine.toString() // Inherited line number
                 }
                 lastLabel = label
             }
 
             override fun visitLineNumber(line: Int, start: Label) {
-                labels2LineNumbers[start] = Integer.toString(line)
+                labels2LineNumbers[start] = line.toString()
                 lastLine = line
             }
         }

js/js.frontend/src/org/jetbrains/kotlin/js/naming/NameSuggestion.kt

@@ -340,7 +340,7 @@ class NameSuggestion {
 
         private fun mangledId(forCalculateId: String): String {
             val absHashCode = Math.abs(forCalculateId.hashCode())
-            return if (absHashCode != 0) Integer.toString(absHashCode, Character.MAX_RADIX) else ""
+            return if (absHashCode != 0) absHashCode.toString(Character.MAX_RADIX) else ""
         }
 
         private val DeclarationDescriptorWithVisibility.ownEffectiveVisibility