impl: new packet structure for eureka

[rnbguy]

Closes: #1364

Description

We use the new v2 packet structure for multi payload structure. The following is the rought overview of the new structure.

Packet {
  header: PacketHeader {
    source_client_on_target: ClientId,
    target_client_on_source: ClientId,
    timeout_on_target: Timeout
    nonce: Bytes,
  },
  payloads: [Payload {
    source_port: PortId.
    target_port: PortId,
    data: Bytes,
  }]
}

Caution

change base branch of PR to feat/ibc-eureka after #1370 is merged

---

PR author checklist:

• Added changelog entry, using unclog.
• Added tests.
• Linked to GitHub issue.
• Updated code comments and documentation (e.g., docs/).
• Tagged one reviewer who will be the one responsible for shepherding this PR.

Reviewer checklist:

• Reviewed Files changed in the GitHub PR explorer.
• Manually tested (in case integration/unit/mock tests are absent).

[codecov]

Codecov Report

Attention: Patch coverage is 17.34736% with 4007 lines in your changes missing coverage. Please review.

Project coverage is 58.10%. Comparing base (cdd4625) to head (c6d916b).

Files with missing lines	Patch %	Lines
ibc-eureka-core/ics24-host/types/src/path.rs	0.00%	683 Missing ⚠️
...-eureka-core/ics04-channel/types/src/events/mod.rs	0.00%	591 Missing ⚠️
ibc-eureka-core/ics02-client/types/src/events.rs	52.83%	191 Missing ⚠️
...reka-core/ics04-channel/src/handler/recv_packet.rs	0.00%	174 Missing ⚠️
...c-eureka-core/ics23-commitment/types/src/merkle.rs	0.00%	146 Missing ⚠️
...c-eureka-core/ics04-channel/src/handler/timeout.rs	0.00%	144 Missing ⚠️
ibc-eureka-core/ics04-channel/types/src/packet.rs	0.00%	141 Missing ⚠️
...-core/ics04-channel/src/handler/acknowledgement.rs	0.00%	133 Missing ⚠️
...reka-core/ics04-channel/src/handler/send_packet.rs	0.00%	115 Missing ⚠️
...cs04-channel/types/src/events/packet_attributes.rs	0.00%	88 Missing ⚠️
... and 50 more

Additional details and impacted files

@@                 Coverage Diff                 @@
##           feat/ibc-eureka    #1365      +/-   ##
===================================================
- Coverage            66.84%   58.10%   -8.74%     
===================================================
  Files                  225      287      +62     
  Lines                22631    27479    +4848     
===================================================
+ Hits                 15127    15968     +841     
- Misses                7504    11511    +4007     

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