KT-26629 Inspection to replace equality check with NaN with isNaN call

idea/testData/inspectionsLocal/convertNaNEquality/.inspection

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.inspections.ConvertEqualsDoubleNaNInspection

idea/testData/inspectionsLocal/convertNaNEquality/float.kt

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+// WITH_RUNTIME
+fun test() {
+    val x = 0.5f <caret>!= Float.NaN
+}

idea/testData/inspectionsLocal/convertNaNEquality/float.kt.after

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+// WITH_RUNTIME
+fun test() {
+    val x = !0.5f.isNaN()
+}

idea/testData/inspectionsLocal/convertNaNEquality/importedProperty.kt

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+// WITH_RUNTIME
+import kotlin.Double.Companion.NaN
+
+fun test() {
+    val t = NaN ==<caret> 5.0
+}

idea/testData/inspectionsLocal/convertNaNEquality/importedProperty.kt.after

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+// WITH_RUNTIME
+import kotlin.Double.Companion.NaN
+
+fun test() {
+    val t = 5.0.isNaN()
+}

idea/testData/inspectionsLocal/convertNaNEquality/inequality.kt

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+// WITH_RUNTIME
+fun main() {
+    val result = 5.0 + 3.0 <caret>!= Double.NaN;
+}

idea/testData/inspectionsLocal/convertNaNEquality/inequality.kt.after

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+// WITH_RUNTIME
+fun main() {
+    val result = !(5.0 + 3.0).isNaN();
+}

idea/testData/inspectionsLocal/convertNaNEquality/javaDouble.kt

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+// RUNTIME_WITH_FULL_JDK
+
+fun test() {
+    val t = java.lang.Double.NaN ==<caret> 5.0
+}

idea/testData/inspectionsLocal/convertNaNEquality/javaDouble.kt.after

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+// RUNTIME_WITH_FULL_JDK
+
+fun test() {
+    val t = 5.0.isNaN()
+}

idea/testData/inspectionsLocal/convertNaNEquality/javaFloatNaN.kt

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+// RUNTIME_WITH_FULL_JDK
+
+fun test() {
+    val a = 0.5f
+    val x = a ==<caret> java.lang.Float.NaN
+}

idea/testData/inspectionsLocal/convertNaNEquality/javaFloatNaN.kt.after

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+// RUNTIME_WITH_FULL_JDK
+
+fun test() {
+    val a = 0.5f
+    val x = a.isNaN()
+}

idea/testData/inspectionsLocal/convertNaNEquality/negative.kt

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+// WITH_RUNTIME
+// PROBLEM: none
+
+class A {
+    val NaN = 0.3
+}
+
+fun test() {
+    val a = A()
+    val t = a.NaN ==<caret> 0.5
+}

idea/testData/inspectionsLocal/convertNaNEquality/simple.kt

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+// WITH_RUNTIME
+fun test() {
+    val t = <caret>5.0 == Double.NaN
+}

idea/testData/inspectionsLocal/convertNaNEquality/simple.kt.after

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+// WITH_RUNTIME
+fun test() {
+    val t = 5.0.isNaN()
+}