Introduce "Unused result of data class copy" inspection

#KT-34121 Fixed

idea/testData/inspectionsLocal/unusedDataClassCopyResult/.inspection

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

idea/testData/inspectionsLocal/unusedDataClassCopyResult/basic.kt

@@ -0,0 +1,11 @@
+// FIX: none
+// WITH_RUNTIME
+fun main() {
+    val o = Foo("")
+    o.<caret>copy(prop = "New")
+    bar(o)
+}
+
+data class Foo(val prop: String)
+
+fun bar(foo: Foo) {}

idea/testData/inspectionsLocal/unusedDataClassCopyResult/basic2.kt

@@ -0,0 +1,13 @@
+// FIX: none
+// WITH_RUNTIME
+fun main() {
+    val o = Foo("")
+    o.run {
+        <caret>copy(prop = "New")
+        bar(o)
+    }
+}
+
+data class Foo(val prop: String)
+
+fun bar(foo: Foo) {}

idea/testData/inspectionsLocal/unusedDataClassCopyResult/used.kt

@@ -0,0 +1,11 @@
+// PROBLEM: none
+// WITH_RUNTIME
+fun main() {
+    val o = Foo("")
+    val o2 = o.<caret>copy(prop = "New")
+    bar(o2)
+}
+
+data class Foo(val prop: String)
+
+fun bar(foo: Foo) {}

idea/testData/inspectionsLocal/unusedDataClassCopyResult/used2.kt

@@ -0,0 +1,13 @@
+// PROBLEM: none
+// WITH_RUNTIME
+fun main() {
+    val o = Foo("")
+    o.run {
+        val o2 = <caret>copy(prop = "New")
+        bar(o2)
+    }
+}
+
+data class Foo(val prop: String)
+
+fun bar(foo: Foo) {}