UnnecessaryVariableInspection: fix false positive in lambda

#KT-32565 Fixed

idea/testData/inspectionsLocal/unnecessaryVariable/copyOfValInLambda.kt

@@ -0,0 +1,16 @@
+// PROBLEM: none
+// WITH_RUNTIME
+fun findCredentials() = 1
+
+fun println(i: Int) {}
+
+fun test() {
+    val data = run {
+        val credentials = findCredentials()
+        object {
+            val <caret>foundCredentials = credentials
+        }
+    }
+
+    println(data.foundCredentials)
+}

idea/testData/inspectionsLocal/unnecessaryVariable/copyOfValInLambda2.kt

@@ -0,0 +1,19 @@
+// PROBLEM: none
+// WITH_RUNTIME
+fun findCredentials() = 1
+
+fun println(i: Int) {}
+
+fun test() {
+    val data = run {
+        val credentials = findCredentials()
+
+        class Foo {
+            val <caret>foundCredentials = credentials
+        }
+
+        Foo()
+    }
+
+    val foundCredentials = data.foundCredentials
+}

idea/testData/inspectionsLocal/unnecessaryVariable/copyOfValInLambda3.kt

@@ -0,0 +1,16 @@
+// WITH_RUNTIME
+fun findCredentials() = 1
+
+fun println(i: Int) {}
+
+fun test() {
+    val credentials = findCredentials()
+
+    val data = run {
+        object {
+            val <caret>foundCredentials = credentials
+        }
+    }
+
+    println(data.foundCredentials)
+}

idea/testData/inspectionsLocal/unnecessaryVariable/copyOfValInLambda3.kt.after

@@ -0,0 +1,15 @@
+// WITH_RUNTIME
+fun findCredentials() = 1
+
+fun println(i: Int) {}
+
+fun test() {
+    val credentials = findCredentials()
+
+    val data = run {
+        object {
+        }
+    }
+
+    println(credentials)
+}