feat: remove creat subfom buttom and show delete button just when it is a s…

[JamalAlabdullah]

Description

• Removed the nytt underskjemabutton and its associated files.
• Display the slett underskjemabutton only when the user navigates to the subform.
• Updated tests accordingly.

Like this:

https://github.com/user-attachments/assets/13299879-ef03-4256-be72-2d86b779b469

Related Issue(s)

• 14041

Verification

• [x] Your code builds clean without any errors or warnings
• [x] Manual testing done (required)
• [x] Relevant automated test added (if you find this hard, leave it and we'll help out)

Documentation

• [ ] User documentation is updated with a separate linked PR in altinn-studio-docs. (if applicable)

[codecov[bot]]

Codecov Report

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

Project coverage is 95.32%. Comparing base (eb8f613) to head (0ada1ed). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #14053 +/- ## ========================================== - Coverage 95.32% 95.32% -0.01% ========================================== Files 1775 1773 -2 Lines 23128 23097 -31 Branches 2685 2683 -2 ========================================== - Hits 22047 22017 -30 + Misses 833 832 -1 Partials 248 248 ```

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[JamalAlabdullah]

Great work @JamalAlabdullah 💪 🙂

I have some separated comments. And according to the video, can you fix so that the height will stay the same when delete button is displayed or not? 🙂

And there are some text resources that are no longer in use after you removed CreateSubformWrapper - remove them as well. Just control that they are not used somewhere else.

Good catch 👍 I fixed the height and removed unused texts.