Implement relaying of ConnOpenAck and ConnOpenConfirm

[ancazamfir]

Closes: #359 and #360

Description

• added the CLIs
• make the necessary queries, validations
• build and send the datagrams

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For contributor use:

• Updated the Unreleased section of CHANGELOG.md with the issue.
• If applicable: Unit tests written, added test to CI.
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Updated relevant documentation (docs/) and code comments.
• Re-reviewed Files changed in the Github PR explorer.

[codecov-io]

Codecov Report

Merging #397 (673da07) into master (b1b37f5) will increase coverage by 21.1%.
The diff coverage is 64.6%.

@@            Coverage Diff            @@
##           master    #397      +/-   ##
=========================================
+ Coverage    13.6%   34.8%   +21.1%     
=========================================
  Files          69     152      +83     
  Lines        3752    9830    +6078     
  Branches     1374    3575    +2201     
=========================================
+ Hits          513    3427    +2914     
- Misses       2618    6164    +3546     
+ Partials      621     239     -382     

Impacted Files	Coverage Δ
modules/src/events.rs	0.0% <0.0%> (ø)
modules/src/ics02_client/events.rs	0.0% <ø> (ø)
modules/src/ics02_client/msgs.rs	0.0% <0.0%> (ø)
modules/src/ics02_client/raw.rs	0.0% <0.0%> (ø)
modules/src/ics03_connection/error.rs	13.6% <0.0%> (-19.7%)	⬇️
modules/src/ics04_channel/error.rs	75.0% <ø> (+50.0%)	⬆️
modules/src/ics04_channel/msgs/acknowledgement.rs	0.0% <0.0%> (ø)
modules/src/ics04_channel/msgs/recv_packet.rs	0.0% <0.0%> (ø)
modules/src/ics04_channel/msgs/timeout.rs	0.0% <0.0%> (ø)
modules/src/ics04_channel/packet.rs	0.0% <0.0%> (ø)
... and 283 more

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