Store the packetID instead of the entire packet for forwarded packets

[colin-axner]

Summary

Following #6635, transfer could store only the packetID for the packet received which generated a forwarded packet. Currently we store the entire packet, when only the packetID information is needed

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[NisTun]

Can I handle this issue @colin-axner ?

[colin-axner]

Hi, @NisTun. Thanks for asking and thanks for your interest. Unfortunately you cannot, the issue is on hold and requires changes to core IBC before it can be worked on. Once that is done, I think the team would like to handle this issue ourselves

[colin-axner]

This issue is on hold until informalsystems/hermes#4078 is addressed. I have moved the issue out of the v9 milestone and into v10, but the exact release it can be addressed in is dependent on the relayers