feat: parse IBC v2 packets from ABCI events

[DeshErBojhaa]

Description

This PR extracts IBC v2 packets from ABCI events.

If the event has attribute AttributeKeyEncodedPacketHex then we unmarshall packet form that attribute.

If attribute AttributeKeyEncodedPacketHex not present, we populate and empty packet from the following four attributes.

1. AttributeKeySequence
2. AttributeKeyTimeoutTimestamp
3. AttributeKeyDstClient
4. AttributeKeySrcClient

closes: #7856

---

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• Linked to GitHub issue with discussion and accepted design, OR link to spec that describes this work.
• Include changelog entry when appropriate (e.g. chores should be omitted from changelog).
• Wrote unit and integration tests if relevant.
• Updated documentation (docs/) if anything is changed.
• Added godoc comments if relevant.
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[codecov-commenter]

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Additional details and impacted files

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08-wasm	44.28% <ø> (?)
ibc-go	68.87% <ø> (?)

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[gjermundgaraba]

Noice! This looks very good to me!
The only thing we need to figure out before merging is if we need to keeper the original functions around with a deprecation notice.

Oh, and it should have a changelog entry

[gjermundgaraba]

After checking around a bit more, it looks like there are enough people using this to warrant deprecating the function. So just add it back (and call the new one) with a deprecation notice.

[AdityaSripal]

Excellent work! Nice and clean fix

[DeshErBojhaa]

After checking around a bit more, it looks like there are enough people using this to warrant deprecating the function. So just add it back (and call the new one) with a deprecation notice.

Here e89a575

[gjermundgaraba]

One tiny comment left to fix, and then this should be ready to merge 🚀

[gjermundgaraba]

Great work! I'll let the tests pass and when that is done we can merge 🙌