Lambda to callable reference: inspection is optional depending on text length

(cherry picked from commit ce0c43c)

idea/testData/inspections/convertLambdaToReference/inspectionData/expected.xml

@@ -0,0 +1,10 @@
+<problems>
+    <problem>
+        <file>test.kt</file>
+        <line>5</line>
+        <module>light_idea_test_case</module>
+        <entry_point TYPE="file" FQNAME="temp:///src/test.kt" />
+        <problem_class severity="WARNING" attribute_key="WARNING_ATTRIBUTES">Can be replaced with function reference</problem_class>
+        <description>Convert lambda to reference</description>
+    </problem>
+</problems>

idea/testData/inspections/convertLambdaToReference/inspectionData/inspections.test

@@ -0,0 +1 @@
+// INSPECTION_CLASS: org.jetbrains.kotlin.idea.intentions.ConvertLambdaToReferenceInspection

idea/testData/inspections/convertLambdaToReference/test.kt

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+// Mostly tested as intention. Here we just test shouldSuggestToConvert()
+
+// Should suggest to convert
+class TheirWrapper(val x: Int)
+val x = { y: Int -> TheirWrapper(y) }
+
+// Should not suggest to convert (too long reference)
+fun foo(arg: TheirWrapper, convert: (TheirWrapper) -> String) = convert(arg)
+val y = foo(TheirWrapper(42)) { it.toString() }