fix!: Disable proto gen for x/gov, remove init blobs from generated code

[ValarDragon]

What is the purpose of the change

A fix needed for https://github.com/osmosis-labs/osmosis/pull/2854

Whats happening is we are removing x/gov from being newly proto generated in this repo. But we don't delete the module as we don't want to break all the code that depends on it. So instead we just remove the init blob for registering these in the global codec, which should hopefully still let this repo pass, and the osmosis one has the true registry.

Brief Changelog

• Remove x/gov from every make proto-all generation
• Remove the init registration for the gov types

Testing and Verifying

• Current tests pass (main goal)
• Osmosis tests in https://github.com/osmosis-labs/osmosis/pull/2854 pass with it returning osmosis proto version
• Added a test that shows that this hacky method works as expected. (Duplicate calls safe, returns right thing)

Documentation and Release Note

• Does this pull request introduce a new feature or user-facing behavior changes? no
• Is a relevant changelog entry added to the Unreleased section in CHANGELOG.md? yes
• How is the feature or change documented? Where should we document it?

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.