[C-API] Querying with object list arguments does not work

[rorbech]

Expected results

Queries with objects in list arguments should work

Ex. passing object references to the IN operator as in this Kotlin test should match the objects that points to the given argument objects:

val child = realm.writeBlocking {
    val child = copyToRealm(QuerySample().apply { stringField = "child" })
    copyToRealm(QuerySample().apply { nullableRealmObject = child })
    child
}

val result = realm.query<QuerySample>("nullableRealmObject IN $0", listOf(even, odd)).find()
assertEquals(1, result.size)

Actual Results

The above query does not return any result. A C-API test of the same has been written in https://github.com/realm/realm-core/pull/6686/files

Steps & Code to Reproduce

See https://github.com/realm/realm-core/pull/6686/files

Core version

Core version: 13.11.0 - https://github.com/realm/realm-core/tree/d8721d7baec39571e7e5373c3f407a50d144307e

[nicola-cab]

Just a small note on the issue, this was not only a C-API related problem.