Check lambda parameter for name shadowing

#KT-5160 Fixed

compiler/testData/diagnostics/tests/shadowing/ShadowLambdaParameter.kt

@@ -0,0 +1,13 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+fun foo1(i: (Int) -> Unit) {}
+fun foo2(i: (Int, Int) -> Unit) {}
+fun foo3(i: (Pair) -> Unit) {}
+
+fun bar(x: Int, y: Int) {
+    foo1 { <!NAME_SHADOWING!>x<!> -> <!UNUSED_EXPRESSION!>x<!> }
+    foo2 { <!NAME_SHADOWING!>x<!>: Int, <!NAME_SHADOWING!>y<!>: Int -> x + y }
+    foo3 { (x, y) -> x + y }
+}
+
+data class Pair(val a: Int, val b: Int)

compiler/testData/diagnostics/tests/shadowing/ShadowLambdaParameter.txt

@@ -0,0 +1,18 @@
+package
+
+public fun bar(/*0*/ x: kotlin.Int, /*1*/ y: kotlin.Int): kotlin.Unit
+public fun foo1(/*0*/ i: (kotlin.Int) -> kotlin.Unit): kotlin.Unit
+public fun foo2(/*0*/ i: (kotlin.Int, kotlin.Int) -> kotlin.Unit): kotlin.Unit
+public fun foo3(/*0*/ i: (Pair) -> kotlin.Unit): kotlin.Unit
+
+public final data class Pair {
+    public constructor Pair(/*0*/ a: kotlin.Int, /*1*/ b: kotlin.Int)
+    public final val a: kotlin.Int
+    public final val b: kotlin.Int
+    public final operator /*synthesized*/ fun component1(): kotlin.Int
+    public final operator /*synthesized*/ fun component2(): kotlin.Int
+    public final /*synthesized*/ fun copy(/*0*/ a: kotlin.Int = ..., /*1*/ b: kotlin.Int = ...): Pair
+    public open override /*1*/ /*synthesized*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*synthesized*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*synthesized*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/shadowing/ShadowVariableInNestedClosureParam.kt

@@ -1,5 +1,5 @@
 fun ff(): Int {
     var i = 1
-    <!UNUSED_LAMBDA_EXPRESSION!>{ i: Int -> i }<!>
+    <!UNUSED_LAMBDA_EXPRESSION!>{ <!NAME_SHADOWING!>i<!>: Int -> i }<!>
     return i
 }