fix: RDK proto dependencies

[keruch]

PR Standards

We need the same proto msg in both Dymint and RDK repos. At the same time, Rollapp-EVM imports both Dymint and RDK, so potentially msg is initialized twice.

Solution	Issue
Copy RDK proto to Dymint, same proto msg name	Proto error: cannot have two implementations of one type
Copy RDK proto to Dymint, different proto msg name	Cosmos Any error: cannot unpack one message to another since they are completely different (different name, different implementation)
Move RDK proto to proto-registry, use it in RDK and Dymint	Need to add methods to messages. To make this work, the entire module (x/sequencers) needs to be moved to the shared repo
✅ Import RDK in Dymint	Dependency cycle, but should be fine as long as we maintain the correct versioning

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For Author:

• Targeted PR against correct branch
• included the correct type prefix in the PR title
• Linked to Github issue with discussion and accepted design
• Targets only one github issue
• Wrote unit and integration tests
• All CI checks have passed
• Added relevant godoc comments

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For Reviewer:

• confirmed the correct type prefix in the PR title
• Reviewers assigned
• confirmed all author checklist items have been addressed

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After reviewer approval:

• In case targets main branch, PR should be squashed and merged.
• In case PR targets a release branch, PR should be rebased.