12576 when component is deleted ensure to remove all configuration for the deleted component

Description

Add an event in synchub in backend that listens to componentID changes in the form-layouts endpoint in the app-development controller.
- In the layouts: Updates the occurrences of the oldComponentId by traversing all layouts recursively. It has three different approaches for updating either;
  1. An occurrence in an expression
  2. An occurrence behaving as a property with any value
  3. An occurrence behaving as a value for a keyValuePair (specified as updating cellRefs in groups)
  4. An occurrence behaving as a member in a tableHeader array for repeating groups
- in the layout-settings: Updates occurrences by simply removing or changing the oldComponentId in the components/excludeFromPdf array.
Passed as an array of changed componentIds to ensure all references of child-components are synced when deleting a group

To Consideration

Current solution when a component is deleted is to replace the reference with null when it behaved as a value, or remove it if it behaved as a member of an array. Not sure if replacing the value with null is the best solution. May be better to delete the object? However, that will not work for expressions. Might check with Apps what makes most sense for Studio to do. Either way we are going to make illegal config or config that will not run correct (or as intended) in an app.

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)

Codecov Report

Attention: Patch coverage is 99.07407% with 1 line in your changes missing coverage. Please review.

Project coverage is 91.48%. Comparing base (396c405) to head (f71a6a8). Report is 4 commits behind head on main.

Files	Patch %	Lines
frontend/app-development/router/routes.tsx	66.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #12940 +/- ## ========================================== + Coverage 91.46% 91.48% +0.01% ========================================== Files 1400 1405 +5 Lines 19821 19873 +52 Branches 2395 2400 +5 ========================================== + Hits 18130 18180 +50 - Misses 1427 1428 +1 - Partials 264 265 +1 ```

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Altinn / altinn-studio