Ignore items in lists where the type is unknown

[A360JMaxxgamer]

Ignores all items when a list is deserialized where the GraphQL type is not part of the schema.graphql file.

• Add TryParse method to IEntityIdSerliazer
• Add check whether entity id can be parsed and whether the item shall be added to the list

Closes #6415

[A360JMaxxgamer]

@PascalSenn is it worth fixing the unit tests or is that as designed?

[michaelstaib]

what is the status on this one?

[A360JMaxxgamer]

I changed the code to use try parse mechanism. If that solution is generally ok with you, I will fix the rest of the unittests. Basically update the snapshots.