Improve loading of apps and data models on Dashboard

[ErlingHauan]

Description

This PR improves the loading of apps and datamodels on the Dashboard page.

1. When the first page of repos have been loaded, a spinnerHeight state is set. This prevents flickering when loading uncached repos.
2. An optional isLoading prop has been added to StudioTableRemotePagination and StudioTableLocalPagination. By using this prop, StudioSpinner will be used internally with the correct height.
3. Added prefetching. When fetching the first page of repos, we also make a call for the second page, which gets stored in the cache. This way, we don't have to show the loading spinner at all when navigating to the second page. Also, when we navigate to the second page, the next page (page 3) is fetched in the background, and so forth. Note that when changing the page size, we will have to show the loading spinner. The goal was not to eliminate the loading spinner all together, but just to make it a little smoother.
4. Replaced Button with StudioButton in the RepoList component, so that we have more control over changes coming from Designsystemet.
5. Replaced the words "Fjern" with "Slett" and "Rediger" with "Endre" in the RepoList component, after guidelines posted by @Ildest on Slack. Also removed the dashboard.edit_data_models text, since it was identical to dashboard:edit_app.

Before this fix:

Screen.Recording.2024-06-27.at.10.28.10.mov

After fixing the spinner height:

smootherLoading.mp4

After adding prefetching:

afterPrefetching.mp4

Related Issue(s)

• StudioTableRemotePagination - maintain height when spinner is displayed #13040

Verification

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

[codecov]

Codecov Report

Attention: Patch coverage is 97.95918% with 1 line in your changes missing coverage. Please review.

Project coverage is 97.29%. Comparing base (1651068) to head (a6bf5df).
Report is 2 commits behind head on main.

Files	Patch %	Lines
...nd/dashboard/hooks/useReposSearch/useRepoSearch.ts	80.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #13137      +/-   ##
==========================================
+ Coverage   92.16%   97.29%   +5.13%     
==========================================
  Files        1443       13    -1430     
  Lines       20302      259   -20043     
  Branches     2432       46    -2386     
==========================================
- Hits        18711      252   -18459     
+ Misses       1326        5    -1321     
+ Partials      265        2     -263     

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[wrt95]

Great job! 🚀
Added some comments 😄

[wrt95]

Great job!