Forbid callable references to members and extensions with empty LHS

This syntax is reserved to be likely used in the future as a shorthand for
"this::foo" where the resulting expression doesn't take the receiver as a
parameter but has "this" already bound to it

compiler/testData/codegen/boxWithStdlib/callableReference/function/classMemberFromClass.kt

@@ -1,7 +1,7 @@
 class A {
     fun foo(k: Int) = k
 
-    fun result() = (::foo)(this, 111)
+    fun result() = (A::foo)(this, 111)
 }
 
 fun box(): String {

compiler/testData/codegen/boxWithStdlib/callableReference/function/classMemberFromExtension.kt

@@ -3,7 +3,7 @@ class A {
     fun k(k: Int) = k
 }
 
-fun A.foo() = (::o)(this) + (A::k)(this, 222)
+fun A.foo() = (A::o)(this) + (A::k)(this, 222)
 
 fun box(): String {
     val result = A().foo()

compiler/testData/codegen/boxWithStdlib/callableReference/function/extensionFromClass.kt

@@ -1,5 +1,5 @@
 class A {
-    fun result() = (::foo)(this, "OK")
+    fun result() = (A::foo)(this, "OK")
 }
 
 fun A.foo(x: String) = x

compiler/testData/codegen/boxWithStdlib/callableReference/function/innerConstructorFromClass.kt

@@ -4,7 +4,7 @@ class A {
         val k = 222
     }
     
-    fun result() = (A::Inner)(this).o + (::Inner)(this).k
+    fun result() = (A::Inner)(this).o + (A::Inner)(this).k
 }
 
 fun box(): String {

compiler/testData/codegen/boxWithStdlib/callableReference/function/innerConstructorFromExtension.kt

@@ -5,7 +5,7 @@ class A {
     }
 }
 
-fun A.foo() = (A::Inner)(this).o + (::Inner)(this).k
+fun A.foo() = (A::Inner)(this).o + (A::Inner)(this).k
 
 fun box(): String {
     val result = A().foo()

compiler/testData/codegen/boxWithStdlib/callableReference/function/privateClassMember.kt

@@ -1,7 +1,7 @@
 class A {
     private fun foo() = "OK"
 
-    fun bar() = (::foo)(this)
+    fun bar() = (A::foo)(this)
 }
 
 fun box() = A().bar()

compiler/testData/codegen/boxWithStdlib/callableReference/function/traitImplMethodWithClassReceiver.kt

@@ -4,7 +4,7 @@ interface T {
 
 class B : T {
     inner class C {
-        fun bar() = (::foo)(this@B)
+        fun bar() = (T::foo)(this@B)
     }
 }