chore: rm checksums from proto and migrator

[johnnylarner]

Description

closes: #5749

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• 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.
• Self-reviewed Files changed in the GitHub PR explorer.
• Provide a conventional commit message to follow the repository standards.

[linear]

IBCGO-30 Remove Checksums type for storing 08-wasm checksums.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.97%. Comparing base (99a847a) to head (b6a6163).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8511   +/-   ##
=======================================
  Coverage   56.97%   56.97%           
=======================================
  Files         291      291           
  Lines       21336    21336           
=======================================
  Hits        12157    12157           
  Misses       8629     8629           
  Partials      550      550           

Flag	Coverage Δ
08-wasm	66.13% <ø> (ø)
e2e	1.18% <ø> (ø)
ibc-go	62.45% <ø> (ø)

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[johnnylarner]

Locally the proto-check-breaking fails because of the rm to the proto file. I guess this acceptable?

[gjermundgaraba]

This looks great! Great to get rid of this 🙌

One thing I want to add is a changelog entry, and this should be good to go! :) Just add it to the root level changelog file - we don't really use the changelog file in the 08-wasm folder anymore.

Edit: I see in our checklist we say not to include chore in the changelog, but since this is technically a breaking change, we should add it.

[gjermundgaraba]

Locally the proto-check-breaking fails because of the rm to the proto file. I guess this acceptable?

Yeah, we're not gonna block this PR on that.

[johnnylarner]

Yep I followed that principle for the chore but i'll deffo add it

[gjermundgaraba]

lgtm! 🚀