Use libnvcomp conda package

[bdice]

Description

The nvcomp conda package is being split into a C++ package libnvcomp and a Python bindings package nvcomp. We want to use the C++ package only, so we are adopting libnvcomp.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.32%. Comparing base (cd54e33) to head (17bb8e7).
Report is 5 commits behind head on branch-25.08.

Additional details and impacted files

@@              Coverage Diff              @@
##           branch-25.08   #19439   +/-   ##
=============================================
  Coverage         81.32%   81.32%           
=============================================
  Files               267      267           
  Lines             35781    35781           
=============================================
  Hits              29100    29100           
  Misses             6681     6681           

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