[DataGrid] Fix regression with `GridTemplateColumns`#3357

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vnbaaij merged 2 commits intodevfrom

users/vnbaaij/fix-issue-#3356

Feb 14, 2025

Commits on Feb 13, 2025

Reset _internalGridTemplateColumns to parameter value. Only auto fill it if parameter value is null
vnbaaij
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Commits on Feb 14, 2025

Merge branch 'dev' into users/vnbaaij/fix-issue-#3356
vnbaaij
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