Introduce "Useless call on not-null type" inspection #KT-18386 Fixed

Supported functions: orEmpty(), isNullOrEmpty(), isNullOrBlank()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/.inspection

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+org.jetbrains.kotlin.idea.inspections.collections.UselessCallOnNotNullInspection

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/NotNullType.kt

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+// WITH_RUNTIME
+
+val list1: List<Int> = listOf(1)
+val list = list1<caret>.orEmpty()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/NotNullType.kt.after

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+// WITH_RUNTIME
+
+val list1: List<Int> = listOf(1)
+val list = list1

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/NotNullTypeChain.kt

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+// WITH_RUNTIME
+
+val list1: List<Int> = listOf(1)
+val list = list1.<caret>orEmpty().map { "$it" }

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/NotNullTypeChain.kt.after

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+// WITH_RUNTIME
+
+val list1: List<Int> = listOf(1)
+val list = list1.map { "$it" }

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/NullOrBlankSafe.kt

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+// WITH_RUNTIME
+
+val s: String? = ""
+val blank = s<caret>?.isNullOrBlank()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/NullOrBlankSafe.kt.after

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+// WITH_RUNTIME
+
+val s: String? = ""
+val blank = s?.isBlank()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/NullOrEmpty.kt

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+// WITH_RUNTIME
+
+val s = ""
+val empty = s<caret>.isNullOrEmpty()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/NullOrEmpty.kt.after

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+// WITH_RUNTIME
+
+val s = ""
+val empty = s.isEmpty()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/NullOrEmptyFake.kt

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+// PROBLEM: none
+// WITH_RUNTIME
+
+val s: String? = null
+val empty = s<caret>.isNullOrEmpty()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/OrEmptyFake.kt

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+// PROBLEM: none
+// WITH_RUNTIME
+
+val list: List<String>? = null
+val empty = list<caret>.orEmpty()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/SafeCall.kt

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+// WITH_RUNTIME
+
+val list1: List<Int>? = listOf(1)
+val list = list1<caret>?.orEmpty()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/SafeCall.kt.after

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+// WITH_RUNTIME
+
+val list1: List<Int>? = listOf(1)
+val list = list1.orEmpty()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/String.kt

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+// WITH_RUNTIME
+
+val s = ""
+val s1 = s<caret>.orEmpty()

idea/testData/inspectionsLocal/collections/uselessCallOnNotNull/String.kt.after

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+// WITH_RUNTIME
+
+val s = ""
+val s1 = s