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/testsWithStdLib/annotations/JvmSyntheticOnDelegate.kt

@@ -1,3 +1,4 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
 import kotlin.properties.Delegates
 
 class My {
@@ -6,4 +7,4 @@ class My {
     // Both Ok
     @get:JvmSynthetic val t: String by lazy { "t" }
     @set:JvmSynthetic var z: String by Delegates.observable("?") { prop, old, new -> old.hashCode() }
-}
+}

compiler/testData/diagnostics/testsWithStdLib/annotations/Volatile.kt

@@ -1,3 +1,4 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
 import kotlin.jvm.Volatile
 import kotlin.properties.Delegates
 
@@ -9,4 +10,4 @@ class My {
     <!VOLATILE_ON_DELEGATE!>@delegate:Volatile<!> var z: String by Delegates.observable("?") { prop, old, new -> old.hashCode() }
 
     <!VOLATILE_ON_VALUE!>@field:Volatile<!> val w = 2
-}
+}

compiler/testData/diagnostics/testsWithStdLib/functionLiterals/pseudocodeMemoryOverhead.kt

@@ -33,8 +33,8 @@ private val STRING = CompileTimeType<String>()
 private val ANY = CompileTimeType<Any>()
 
 
-private val emptyBinaryFun: Function2<BigInteger, BigInteger, BigInteger> = { a, b -> BigInteger("0") }
-private val emptyUnaryFun: Function1<Long, Long> = { a -> 1.toLong() }
+private val emptyBinaryFun: Function2<BigInteger, BigInteger, BigInteger> = { <!UNUSED_PARAMETER!>a<!>, <!UNUSED_PARAMETER!>b<!> -> BigInteger("0") }
+private val emptyUnaryFun: Function1<Long, Long> = { <!UNUSED_PARAMETER!>a<!> -> 1.toLong() }
 
 private val unaryOperations: HashMap<UnaryOperationKey<*>, Pair<Function1<Any?, Any>, Function1<Long, Long>>>
         = hashMapOf<UnaryOperationKey<*>, Pair<Function1<Any?, Any>, Function1<Long, Long>>>(
@@ -368,4 +368,4 @@ class BigInteger(val value: String) {
     fun or(o: BigInteger): BigInteger = o
     fun and(o: BigInteger): BigInteger = o
     fun xor(o: BigInteger): BigInteger = o
-}
+}