fix(drive): unknown mn_rr fork height

[shumkov]

Issue being fixed or feature implemented

 2024-07-23T18:58:32.717312Z DEBUG dashcore_rpc: JSON-RPC request: protx ["listdiff",1,5400]
    at /root/.cargo/git/checkouts/rust-dashcore-rpc-474497c1dcebe04a/9e59614/client/src/client.rs:1646 on main ThreadId(1)
    in tenderdash_abci::tracing_span::abci with endpoint: "InitChain", request_id: "e994bea4-b338-47b3-91cb-2721b3553294"

  2024-07-23T18:58:32.717754Z DEBUG dashcore_rpc: JSON-RPC error for protx: RpcError { code: -1, message: "block must be a chain height and not 5400", data: None }
    at /root/.cargo/git/checkouts/rust-dashcore-rpc-474497c1dcebe04a/9e59614/client/src/client.rs:1666 on main ThreadId(1)
    in tenderdash_abci::tracing_span::abci with endpoint: "InitChain", request_id: "e994bea4-b338-47b3-91cb-2721b3553294"

It means the fork is active but Core doesn't have blocks for this height yet.

What was done?

• Return an error (to retry) if the mn_rr fork height is not chain locked yet

How Has This Been Tested?

None

Breaking Changes

None

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
• I have made corresponding changes to the documentation if needed

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone