Do not always generate synthetic "$annotations" as private

Since annotations are a part of the declaration, they must have the same
visibility as the declaration in the bytecode. Otherwise obfuscators like
Proguard might strip the "$annotations" method and no annotations would be
found via Kotlin reflection

 #KT-15993 Fixed

compiler/testData/writeFlags/property/syntheticAnnotationsMethod/privateProperty.kt

@@ -0,0 +1,10 @@
+class Foo {
+    annotation class Anno
+
+    @Anno
+    private val prop = 42
+}
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Foo, prop$annotations
+// FLAGS: ACC_DEPRECATED, ACC_STATIC, ACC_SYNTHETIC, ACC_PRIVATE

compiler/testData/writeFlags/property/syntheticAnnotationsMethod/protectedProperty.kt

@@ -0,0 +1,10 @@
+open class Foo {
+    annotation class Anno
+
+    @Anno
+    protected val prop = 42
+}
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Foo, prop$annotations
+// FLAGS: ACC_DEPRECATED, ACC_STATIC, ACC_SYNTHETIC, ACC_PROTECTED

compiler/testData/writeFlags/property/syntheticAnnotationsMethod/publicProperty.kt

@@ -0,0 +1,10 @@
+class Foo {
+    annotation class Anno
+
+    @Anno
+    val prop = 42
+}
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: Foo, prop$annotations
+// FLAGS: ACC_DEPRECATED, ACC_STATIC, ACC_SYNTHETIC, ACC_PUBLIC

compiler/testData/writeFlags/typealias/syntheticAnnotationsMethod/privateTypealias.kt

@@ -0,0 +1,9 @@
+@Target(AnnotationTarget.TYPEALIAS)
+annotation class Anno
+
+@Anno
+private typealias Foo = String
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: PrivateTypealiasKt, Foo$annotations
+// FLAGS: ACC_DEPRECATED, ACC_STATIC, ACC_SYNTHETIC, ACC_PRIVATE

compiler/testData/writeFlags/typealias/syntheticAnnotationsMethod/publicTypealias.kt

@@ -0,0 +1,9 @@
+@Target(AnnotationTarget.TYPEALIAS)
+annotation class Anno
+
+@Anno
+typealias Foo = String
+
+// TESTED_OBJECT_KIND: function
+// TESTED_OBJECTS: PublicTypealiasKt, Foo$annotations
+// FLAGS: ACC_DEPRECATED, ACC_STATIC, ACC_SYNTHETIC, ACC_PUBLIC