Copy parameter cell metadata to injected parameters cell

[paranoa233]

Summary

• copy metadata from the original parameters cell to the injected parameters cell
• filter the original parameters tag while preserving other metadata/tags
• keep report mode source hiding compatible with copied jupyter metadata

Fixes #731.

Tests

• python -m pytest papermill/tests/test_parameterize.py -q
• python -m pytest papermill/tests/test_parameterize.py papermill/tests/test_inspect.py papermill/tests/test_utils.py -q

Note: python -m pytest papermill/tests/test_execute.py -q passes 25/26 locally; the remaining failure is TestBrokenNotebook2.test, where this minimal environment produces an error output instead of the expected display_data output for the fixture notebook. The failure is unrelated to parameter metadata handling.

[ayushnandi718-dev]

Good change. Preserving cell metadata (like slideshow type) from the original parameters cell is important for presentations. Verified the logic handles the edge case where no parameters cell exists. LGTM!