Serialize orders for all clients

[pchote]

Fixes #20478.
Supersedes #20479.

This implements a cleaner solution that more closely matches the behaviour before the orders rewrite.

[PunkPun]

Didn't spot any issues

[abcdefg30]

Changelog

10ff24f
0a4c416
96e0f96

[dnqbob]

I haven't try it yet, but do you test this on https://github.com/ABrandau/Shattered-Paradise-SDK/tree/Sync-test2?

[dnqbob]

Also there is a thought:

We can also drop the generation code serialization in #20084, becuase we now make all client serialize/deserialize order, @abcdefg30

We did not serialize (and deserialize) the actor generation and thus did not send it over the network with the orders. Since our network changes, orders are no longer serialized and deserialized for the client issuing them.
That means that an order can be send with a target that is or becomes invalid for the local client (due to the generation changing), but remains valid for other receiving clients (since they do not know about the generation change). Obviously having one client with an invalid target while the other one(s) have a valid target does not play well with syncing.

If this fix is not enough, we can always fall back to just serializing and deserializing local orders again.

Now we basically fall back to just serializing and deserializing local orders again, right? maybe other related PRs can be also closed/reverted due to this PR.

[abcdefg30]

This is more meant as short term fix, in the long run the local orders shouldn't be serialized and deserialized.

[dnqbob]

Then I will reopen #20479.