Fixes qgridnext import error in tests

[andrewfullard]

📝 Description

Type: 🪲 bugfix

The previous qgridnext import check #2819 caused tests to fail. This version falls back to regular qgrid, which will still raise an exception logging error but prevents test failures.

🚦 Testing

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• Testing pipeline
• Other method (describe)
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☑️ Checklist

• I requested two reviewers for this pull request
• I updated the documentation according to my changes
• I built the documentation by applying the build_docs label

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[tardis-bot]

*beep* *bop*
Hi human,
I ran ruff on the latest commit (d75e778).
Here are the outputs produced.
Results can also be downloaded as artifacts here.
Summarised output:

Complete output(might be large):

All checks passed!

[tardis-bot]

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The docs workflow has succeeded ✔️

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 70.51%. Comparing base (4c6780c) to head (d75e778).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
tardis/visualization/widgets/util.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2834      +/-   ##
==========================================
- Coverage   70.87%   70.51%   -0.37%     
==========================================
  Files         209      209              
  Lines       15589    15589              
==========================================
- Hits        11049    10992      -57     
- Misses       4540     4597      +57     

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