refactor: Move statesync_test canister to Rust CDK

[dsarlis]

dfn_core is considered deprecated and the plan is to eventually remove it. Therefore, we need to move any canisters in the ic repo that still depend on it to instead use the public CDK. This PR migrates the statesync_test canister.

[derlerd-dfinity]

Given that we ran into quite some trouble with the XNet test canister port, would it be possible to trigger all the tests that typically also run on an RC on this one?

[dsarlis]

Given that we ran into quite some trouble with the XNet test canister port, would it be possible to trigger all the tests that typically also run on an RC on this one?

I have asked the team to let me know what I need to run. I have confirmed that both rejoin_test_large_state and state_sync_malicious_chunk_test are successful on the latest commit. If there are more I need to run, let me know.

[derlerd-dfinity]

I have asked the team to let me know what I need to run. I have confirmed that both rejoin_test_large_state and state_sync_malicious_chunk_test are successful on the latest commit. If there are more I need to run, let me know.

Please trigger the pipelines that usually run on an RC. My concern is that -- similar to last time -- running selective tests will make us miss some subtle connections.

[ShuoWangNSL]

Thanks. The refactoring looks good to me.

[dsarlis]

Release testing pipeline is green on latest commit.

cc @derlerd-dfinity

[derlerd-dfinity]

Release testing pipeline is green on latest commit.

cc @derlerd-dfinity

Thanks a lot @dsarlis for running these tests! Given that Shuo has already approved the code changes feel free to go ahead with merging right away.