Make a CI process for testing API breaks

[ValarDragon]

Background

We should make a CI process, to test if a PR is making an API breaking change that affects modules we depend on.

Suggested Design

Have a CI workflow / python or bash script that:

• git clones a given version of IBC-go and Wasmd
  • Ideally in an adjacent directory to the SDK
• Adds a replace directive to the SDK, for their go.mods
  • e.g. replace github.com/cosmos/cosmos-sdk => /absolute/path/on_filesystem/to/cosmos-sdk
  • (Will need to play around with relative path formatting etc. Can start by running the script with an absolute path to test tho)
• Run a build command on IBC-go and Wasmd. (TBD if its literally just make build)

Acceptance Criteria

CI process alerts us to if were making an API break that affects IBC or wasmd.