fix: empty tessellation data conversion

[jacobrkerstetter]

Description

• addresses issue where tessellation fails to convert from gRPC object to Polydata when tessellation response data has empty vertices/faces arrays

Issue linked

TFS Bug 1335500

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate unit tests.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: extrude circle to cylinder)

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 94.50%. Comparing base (782aa66) to head (0977c40).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ys/geometry/core/_grpc/_services/v0/conversions.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2284      +/-   ##
==========================================
- Coverage   94.50%   94.50%   -0.01%     
==========================================
  Files         169      169              
  Lines       11126    11128       +2     
==========================================
+ Hits        10515    10516       +1     
- Misses        611      612       +1     

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[RobPasMue]

Can we test this somehow?