Annotations are not collected for object kinds

[cy6erGn0m]

Describe the bug

getEntityAnnotations() for an object descriptor is empty in spite of that the annotation class is marked with @SerialInfo meta-annotation. This works well for regular classes.

To Reproduce

class ObjectSerialInfoTest {

    @Test
    @ImplicitReflectionSerializer
    fun annotations() {
        val childDescriptor = serializer<Root.Child>().descriptor
        assertEquals(1, childDescriptor.getEntityAnnotations().size)
        assertEquals(22, (childDescriptor.getEntityAnnotations().single() as MetaData).metaValue)
        assertEquals(2, childDescriptor.elementsCount)
        
        val rootDescriptor = childDescriptor.getElementDescriptor(1)
        assertEquals(1, rootDescriptor.getEntityAnnotations().size)
        assertEquals(11, (childDescriptor.getEntityAnnotations().single() as MetaData).metaValue)
    }

    @SerialInfo
    annotation class MetaData(val metaValue: Int)

    @Serializable
    @MetaData(11)
    object Root {

        @Serializable
        @MetaData(22)
        class Child(val id: Int, val root: Root = Root)
    }
}

Expected behaviour

SerialDescriptor should work the same as for a regular class descriptor - it should return annotations and the test should pass.

Environment

• Kotlin version: 1.3.61
• Library version: 0.14.0
• Kotlin platforms: JVM