Implements KAnnotatedElement.hasAnnotation()

This commit fixes KT-29041, by adding a convenience method to verify if a certain `KAnnotatedElement` has an annotation or not

compiler/testData/codegen/box/reflection/annotations/hasAnnotation.kt

@@ -0,0 +1,25 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+import kotlin.reflect.full.hasAnnotation
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+annotation class Baz
+annotation class Far
+
+@Baz
+@Far
+class Foo
+
+class Bar
+
+fun box(): String {
+    assertFalse(Bar::class.hasAnnotation<Baz>())
+    assertFalse(Bar::class.hasAnnotation<Far>())
+
+    assertTrue(Foo::class.hasAnnotation<Baz>())
+    assertTrue(Foo::class.hasAnnotation<Far>())
+
+    return "OK"
+}