🩹 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

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

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[github-actions[bot]]

:point_left: Launch a binder notebook on branch _jsnel/pyglotaran/fix_numpy_2_issuesstaging

[sonarcloud[bot]]

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[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 85.3%. Comparing base (f21ca65) to head (dcd45ed). Report is 1 commits behind head on staging.

Additional details and impacted files

```diff @@ 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.