Fix raw rows to pandas (keep all rows)

[haakonvt]

[7.49.2] - 2024-06-12

Fixed

• Converting rows (RowList and RowListWrite) to a pandas DataFrame no longer silently drops rows that do not have
  any columnar data.

Checklist:

• Tests added/updated.
• Documentation updated. Documentation is generated from docstrings - these must be updated according to your change.
  If a new method has been added it should be referenced in cognite.rst in order to generate docs based on its docstring.
• Changelog updated in CHANGELOG.md.
• Version bumped. If triggering a new release is desired, bump the version number in _version.py and pyproject.toml per semantic versioning.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.91%. Comparing base (c4cf969) to head (2ff8569).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1806      +/-   ##
==========================================
- Coverage   92.93%   92.91%   -0.03%     
==========================================
  Files         121      121              
  Lines       17700    17703       +3     
==========================================
- Hits        16450    16449       -1     
- Misses       1250     1254       +4     

Files	Coverage Δ
cognite/client/_version.py	100.00% <100.00%> (ø)
cognite/client/data_classes/raw.py	92.42% <100.00%> (+0.17%)	⬆️

... and 3 files with indirect coverage changes