KT-6671 Report unused constructor parameters

#KT-6671 fixed

compiler/testData/diagnostics/tests/inference/constraints/kt6320.kt

@@ -3,7 +3,7 @@
 
 class A<X, Y : X>
 
-class B<X, Y : X>(foo: A<X, Y>) {
+class B<X, Y : X>(<!UNUSED_PARAMETER!>foo<!>: A<X, Y>) {
     fun test1(a: A<X, Y>) {
         B(a)
         val b: B<X, Y> = B(a)
@@ -13,7 +13,7 @@ class B<X, Y : X>(foo: A<X, Y>) {
 
 class C<X, Z, Y : X>
 
-class D<X, Z, Y : X>(foo: C<X, Z, Y>) {
+class D<X, Z, Y : X>(<!UNUSED_PARAMETER!>foo<!>: C<X, Z, Y>) {
     fun test(a: C<Y, Y, Y>) {
         val d: D<X, Y, Y> = <!TYPE_MISMATCH!>D(a)<!>
     }

compiler/testData/diagnostics/tests/inference/dependantOnVariance.kt

@@ -1,6 +1,6 @@
 package a
 
-class MyList<T>(t: T) {}
+class MyList<T>(<!UNUSED_PARAMETER!>t<!>: T) {}
 
 fun <T> getMyList(t: T)           : MyList<    T> = MyList(t)
 fun <T> getMyListToWriteTo(t: T)  : MyList< in T> = MyList(t)

compiler/testData/diagnostics/tests/inference/upperBounds/useBoundsIfUnknownParameters.kt

@@ -3,7 +3,7 @@ package Hello
 open class Base<T>
 class StringBase : Base<String>()
 
-class Client<T, X: Base<T>>(x: X)
+class Client<T, X: Base<T>>(<!UNUSED_PARAMETER!>x<!>: X)
 
 fun test() {
     val c = Client(StringBase()) // Type inference fails here for T.