Allow top-level local delegated properties in scripts

compiler/testData/codegen/script/topLevelLocalDelegatedProperty.kts

@@ -0,0 +1,12 @@
+import kotlin.reflect.KProperty
+
+class Delegate {
+    operator fun getValue(t: Any?, p: KProperty<*>): Int = 3
+}
+
+
+val prop: Int by Delegate()
+
+val  x = prop
+
+// expected: x: 3

compiler/testData/diagnostics/tests/script/topLevelVariable.kts

@@ -8,7 +8,7 @@ class Delegate {
     }
 }
 
-val a: Int <!SCRIPT_TOP_LEVEL_LOCAL_VARIABLE_WITH_DELEGATE!>by Delegate()<!>
+val a: Int by Delegate()
 
 class Foo {
     val a: Int by Delegate()

compiler/testData/repl/topLevelLocalDelegatedProperty.repl

@@ -0,0 +1,23 @@
+>>> import kotlin.reflect.KProperty;
+>>> class Delegate {
+...    var inner = 1
+...    operator fun getValue(t: Any?, p: KProperty<*>): Int = inner
+...    operator fun setValue(t: Any?, p: KProperty<*>, i: Int) {
+...        inner = i
+...    }
+...}
+
+>>> var prop1: Int = 1
+>>> prop1
+1
+>>> prop1 = 2
+>>> prop1
+2
+>>> var prop2: Int = 100
+>>> prop2
+100
+>>> prop2 = prop2 + 2
+>>> prop2
+102
+>>> prop1
+2