Move mtcs app to the cycles-protocol repo

[ebuchman]

Since a bunch of mtcs app development is happening in the sandbox, and this repo should be anyways more focused on quartz and its example app, we should move the mtcs app to a new repo asap. Probably requires merging all open PRs first but then before any more work on mtcs app it should move to a fresh repo, we can call it cycles-protocol for now.

Then all issues and work in this repo can focus exclusively on quartz.

Acceptance criteria

• The apps/mtcs dir is completely removed from repo.
• All CI workflows are updated to build the transfers app instead of the MTCS app.
• Move transfers app to /examples? (maybe separate PR? We talked about this before but not sure what it entails.)
• Remove all occurences of cw-tee-mtcs (e.g. in Cargo.tomls, scripts, etc.) - there's also one cross dependency where quartz-enclave is depending on cw-tee-mtcs, but that seems like an unused dep.

[hu55a1n1]

The cycles-protocol repo is ready and we've also pushed some code there but it's not up-to-date with recent MTCS contract changes (e.g. CosmWasm v2, light client addition, mock SGX, etc.). I suggest we wait for #69 and #82 before syncing those changes with the cycles-protocol repo.

[hu55a1n1]

Related informalsystems/cycles-protocol#64

[llunaCreixent]

The util cycles-sync should also be moved to cycles-protocol

[davekaj]

closed by #222