Fix "Unused import" for 'provideDelegate'

#KT-31319 Fixed

idea/testData/editor/optimizeImports/common/ProvideDelegate.dependency.kt

@@ -0,0 +1,7 @@
+package a
+
+import kotlin.properties.ReadOnlyProperty
+import kotlin.reflect.KProperty
+
+class C
+operator fun C.provideDelegate(thisRef: Any, prop: KProperty<*>): ReadOnlyProperty<Any, C> = TODO()

idea/testData/editor/optimizeImports/common/ProvideDelegate.kt

@@ -0,0 +1,8 @@
+package b
+
+import a.C
+import a.provideDelegate
+
+class Example {
+    val c: C = C()
+}

idea/testData/editor/optimizeImports/common/ProvideDelegate.kt.after

@@ -0,0 +1,7 @@
+package b
+
+import a.C
+
+class Example {
+    val c: C = C()
+}

idea/testData/editor/optimizeImports/common/ProvideDelegate2.dependency.kt

@@ -0,0 +1,7 @@
+package a
+
+import kotlin.properties.ReadOnlyProperty
+import kotlin.reflect.KProperty
+
+class C
+operator fun C.provideDelegate(thisRef: Any, prop: KProperty<*>): ReadOnlyProperty<Any, C> = TODO()

idea/testData/editor/optimizeImports/common/ProvideDelegate2.kt

@@ -0,0 +1,8 @@
+package b
+
+import a.C
+import a.provideDelegate
+
+class Example {
+    val c: C by C()
+}

idea/testData/editor/optimizeImports/common/ProvideDelegate2.kt.after

@@ -0,0 +1,8 @@
+package b
+
+import a.C
+import a.provideDelegate
+
+class Example {
+    val c: C by C()
+}