[RUST][CI] Add gpu node in jenkins

[ehsanmok]

Hi

Right now, for Rust frontend PR #2292 it's required to have a gpu node similar to java to have a successful build.

Please include tests/scripts/task_rust.sh for now so that it can be changed in the frontend PR.

[tqchen]

Given that we are quite low on resources, can we restrict the test to CPU only and detect if gpu exists and optionally run gpu tests? See some python tests for example

[ehsanmok]

Absolutely! however, there needs to be separate task_rust_runtime.sh and task_rust_fronted.sh because runtime need no unpacking the libs in jenkins while for frontend is a must.

[tqchen]

Sure, we can have two scripts, closing this for now as the original comment is already resolved

[ehsanmok]

@tqchen Should this be merge before the PR? afaik, jenkins caches the build so cannot be in the same PR

[tqchen]

Please send a PR with task_rust_frontend.sh(which is an empty script) added to Jenkinsfile, after that is merged, you can update task_rust_frontend to add your test scripts