Rename toDelegateFor to provideDelegate.

compiler/testData/diagnostics/tests/delegatedProperty/provideDelegate/simpleProvideDelegate.kt

@@ -0,0 +1,10 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+import kotlin.reflect.KProperty
+
+operator fun String.provideDelegate(a: Any?, p: KProperty<*>) = this
+operator fun String.getValue(a: Any?, p: KProperty<*>) = this
+
+val test1: String by "OK"
+
+val test2 by "OK"