Pull request #4551: Api Tweaks

Pull request #4551: Api Tweaks

Merge in SNORT/snort3 from ~RUCOMBS/snort3:api_tweaks to master

Squashed commit of the following:

commit 50b83b5e26510b702a5c896fe02198a09f024f53
Author: Russ Combs <rucombs@cisco.com>
Date:   Mon Dec 16 11:24:58 2024 -0500

    tcp_pdu: rename to tlv_pdu

commit 325cbe349a3c4065244d82d391bad748d40e6d6f
Author: Russ Combs <rucombs@cisco.com>
Date:   Mon Dec 16 11:13:33 2024 -0500

    data_bus: remove unsubscribe methods

commit f37fc721d0417d20ef6679ad7871c8b06b187bf2
Author: Russ Combs <rucombs@cisco.com>
Date:   Mon Dec 16 11:13:06 2024 -0500

    ips: add access to Event references