Fix parallel external source test swapped parameters

[mzient]

Category:

Bug fix (non-breaking change which fixes an issue)

Description:

This PR fixes the swapped num_workers/batch_size, which resulted in running out of handles.

Additional information:

Affected modules and functionalities:

Key points relevant for the review:

Tests:

• Existing tests apply
• New tests added
  • Python tests
  • GTests
  • Benchmark
  • Other
• N/A

Checklist

Documentation

• Existing documentation applies
• Documentation updated
  • Docstring
  • Doxygen
  • RST
  • Jupyter
  • Other
• N/A

DALI team only

Requirements

• Implements new requirements
• Affects existing requirements
• N/A

REQ IDs: N/A

JIRA TASK: N/A

[greptile-apps]

Greptile Summary

This PR fixes parameter binding in two parallel external source tests. The main changes are:

• Reorders test_exception_propagation Cartesian parameters so num_workers is bound first.
• Reorders test_layout Cartesian parameters in the same way.
• Keeps the generated parameter combinations the same while correcting which values reach batch_size and py_num_workers.

Confidence Score: 5/5

This looks safe to merge.

• No blocking issues found in the changed code.

Important Files Changed

Filename	Overview
dali/test/python/test_external_source_parallel.py	Reorders two parameterized test signatures and decorators so worker counts and batch sizes bind to the intended arguments.

_{Reviews (1): Last reviewed commit: "Fix num_workers swapped with batch_size ..." | Re-trigger Greptile}

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