Add raw container (copilot) integration test

[wayner0628]

Tracking issue

flyteorg/flyte#5930

Why are the changes needed?

To prevent in the future, someone writing code that will break the copilot.

What changes were proposed in this pull request?

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

How was this patch tested?

Setup process

Screenshots

Check all the applicable boxes

• I updated the documentation accordingly.
• All new and existing tests passed.
• All commits are signed-off.

Related PRs

#2887

Docs link

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.23%. Comparing base (6bf6f8e) to head (c242784).
Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2891      +/-   ##
==========================================
+ Coverage   76.79%   79.23%   +2.43%     
==========================================
  Files         196      199       +3     
  Lines       20546    20792     +246     
  Branches     2646     2673      +27     
==========================================
+ Hits        15779    16474     +695     
+ Misses       4068     3573     -495     
- Partials      699      745      +46     

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