🩹 Use .data attribute in add_svd_to_dataset function to fix numpy>2 issue

[jsnel]

Forward port of #1520

Change summary

• 🩹Fix prepare_dataset's add_svd_to_dataset function by using raw numpy .data array instead of xarray dataarray by to resolve an issue with numpy>2.

Checklist

• ✔️ Passing the tests (mandatory for all PR's)

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[github-actions]

👈 Launch a binder notebook on branch jsnel/pyglotaran/fix_numpy_2_issues_staging

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.3%. Comparing base (f21ca65) to head (dcd45ed).
Report is 3 commits behind head on staging.

Additional details and impacted files

@@           Coverage Diff           @@
##           staging   #1522   +/-   ##
=======================================
  Coverage     85.3%   85.3%           
=======================================
  Files           91      91           
  Lines         3756    3756           
  Branches       734     734           
=======================================
  Hits          3205    3205           
  Misses         439     439           
  Partials       112     112           

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[jsnel]

All tests except Compare Results are passing. The results is unchanged w.r.t. previous PR (e.g. #1501). So this should be good to go.

[s-weigand]

LGTM