Report warning on unused entities that can be renamed to _

Currently it's all about lambda parameters/destructuring entries

 #KT-14347 In Progress

compiler/testData/diagnostics/tests/j+k/samByProjectedType/genericInReturnType.kt

@@ -19,32 +19,32 @@ public class A {
 // FILE: main.kt
 fun main() {
     A().foo {
-        x -> 1
+        x -> x.hashCode()
     }
 
     A.bar {
-        x -> 1
+        x -> x.hashCode()
     }
 
 
     // baz
     A.baz {
-        x -> "" // OK
+        x -> x.toString() // OK
     }
 
     A.baz {
-        x -> <!CONSTANT_EXPECTED_TYPE_MISMATCH!>1<!>
+        x -> <!TYPE_MISMATCH!>x.hashCode()<!>
     }
 
     val block: (String) -> Any? = {
-        x -> 1
+        x -> x.hashCode()
     }
 
     A().foo(block)
     A.bar(block)
 
     val block2: (String) -> CharSequence? = {
-        x -> ""
+        x -> x.toString()
     }
 
     A.<!NONE_APPLICABLE!>baz<!>(block)

compiler/testData/diagnostics/tests/j+k/samByProjectedType/noAdapterBecuaseOfRecursiveUpperBound.kt

@@ -16,12 +16,12 @@ public class A {
 // FILE: main.kt
 fun main() {
     A().foo <!TYPE_MISMATCH!>{
-        <!CANNOT_INFER_PARAMETER_TYPE!>x<!> ->
+        <!CANNOT_INFER_PARAMETER_TYPE, UNUSED_PARAMETER!>x<!> ->
         ""
     }<!>
 
     A.bar <!TYPE_MISMATCH!>{
-        <!CANNOT_INFER_PARAMETER_TYPE!>x<!> ->
+        <!CANNOT_INFER_PARAMETER_TYPE, UNUSED_PARAMETER!>x<!> ->
         ""
     }<!>
 }

compiler/testData/diagnostics/tests/j+k/samByProjectedType/starProjectionComplexUpperBound.kt

@@ -27,7 +27,7 @@ fun main() {
         ""
     }
 
-    val block: (Map<String, Int>) -> CharSequence = { x -> "" }
+    val block: (Map<String, Int>) -> CharSequence = { x -> x.toString() }
     A().foo(block)
     A.bar(block)
 }