[Core feature] Add raw container (copilot) integration test

[Future-Outlier]

Motivation: Why do you think this is important?

This is super important to prevent in the future, someone writing code that will break the copilot.

Goal: What should the final outcome look like, ideally?

add code tests/flytekit/unit/core/test_local_raw_container.py to tests/flytekit/integration/remote/test_remote.py.

Describe alternatives you've considered

We should do it.

Propose: Link/Inline OR Additional context

No response

Are you sure this issue hasn't been raised already?

• Yes

Have you read the Code of Conduct?

• Yes

[wayner0628]

#take