test: Remove shared memory key from the error response

[yinggeh]

What does the PR do?

Remove shared memory key id from client error response when out-of-memory. The shared memory key can used for malicious exploitation. Update corresponding tests.

Before:
[500] Failed to increase the shared memory pool size for key 'triton_python_backend_shm_region_fb03b647-0083-4d79-826b-894768e8f782' to 1048576 bytes. If you are running Triton inside docker, use '--shm-size' flag to control the shared memory region size. Error: No space left on device
After:
[500] Failed to increase the shared memory pool size to 1048576 bytes. If you are running Triton inside docker, use '--shm-size' flag to control the shared memory region size. Error: No space left on device

Checklist

• PR title reflects the change and is of format <commit_type>: <Title>
• Changes are described in the pull request.
• Related issues are referenced.
• Populated github labels field
• Added test plan and verified test passes.
• Verified that the PR passes existing CI.
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• Added succinct git squash message before merging ref.
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• Optional: Additional screenshots for behavior/output changes with before/after.

Commit Type:

Check the conventional commit type
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• test

Related PRs:

triton-inference-server/python_backend#403

Where should the reviewer start?

Test plan:

• L0_backend_python--base

• CI Pipeline ID:
  30661061

Caveats:

Background

Related Issues: (use one of the action keywords Closes / Fixes / Resolves / Relates to)

• closes GitHub issue: #xxx