Navigate to lambda declaration from generated 'it' (KT-16992)

#KT-16992 Fixed
 #KT-13013 In Progress

idea/testData/navigation/gotoDeclaration/itExtensionLambda.test

@@ -0,0 +1,23 @@
+// FILE: before.kt
+interface Foo
+interface Bar
+
+fun foo(a: Foo.(Bar) -> Unit) {}
+
+fun bar() {
+    foo {
+        <caret>it
+    }
+}
+
+// FILE: after.kt
+interface Foo
+interface Bar
+
+fun foo(a: Foo.(Bar) -> Unit) {}
+
+fun bar() {
+    foo {<caret>
+        it
+    }
+}

idea/testData/navigation/gotoDeclaration/itExtensionLambdaInBrackets.test

@@ -0,0 +1,23 @@
+// FILE: before.kt
+interface Foo
+interface Bar
+
+fun foo(b: Int, a: Foo.(Bar) -> Unit) {}
+
+fun bar() {
+    foo(12, {
+        <caret>it
+    })
+}
+
+// FILE: after.kt
+interface Foo
+interface Bar
+
+fun foo(b: Int, a: Foo.(Bar) -> Unit) {}
+
+fun bar() {
+    foo(12, {<caret>
+        it
+    })
+}

idea/testData/navigation/gotoDeclaration/itInLambdaAsDefaultArgument.test

@@ -0,0 +1,5 @@
+// FILE: before.kt
+fun test(a: (Int) -> Unit = { <caret>it }) {}
+
+// FILE: after.kt
+fun test(a: (Int) -> Unit = {<caret> it }) {}

idea/testData/navigation/gotoDeclaration/itInLambdaWithoutCall.test

@@ -0,0 +1,5 @@
+// FILE: before.kt
+val a: (Int) -> Unit = { <caret>it }
+
+// FILE: after.kt
+val a: (Int) -> Unit = {<caret> it }

idea/testData/navigation/gotoDeclaration/itParameterInLambda.test

@@ -0,0 +1,23 @@
+// FILE: before.kt
+class Foo
+
+fun <T> some(a: T, f: (T) -> Unit) {}
+fun foo(a: Any) {}
+
+fun baz() {
+    some(Foo()) {
+        foo(it<caret>)
+    }
+}
+
+// FILE: after.kt
+class Foo
+
+fun <T> some(a: T, f: (T) -> Unit) {}
+fun foo(a: Any) {}
+
+fun baz() {
+    some(Foo()) {<caret>
+        foo(it)
+    }
+}