Support instantiation between apps

## Description
Extracted from Altinn/altinn-studio#6196.

Support for instantiation from a stateless view to a stateful view within the same app was supported in Altinn/altinn-studio#6196. This covers the need to instantiate a different app.

## Screenshots

## Considerations

### Ops requirements

## Acceptance criteria
- Possible to instantiate a separate app (within the same org? Is it possible between orgs?)

## Specification tasks

- [ ] Development tasks are defined

## Development tasks
- [ ] Update instantiationButton to support configuring what app to target
- [ ] Redirect if successfull

## Test

## Definition of done

- [ ] Documentation (docs.altinn.studio) is updated (if relevant)
- [ ] Technical documentation
- [ ] User documentation
- [ ] QA
- [ ] Manual test is complete (if relevant)
- [ ] Automated test is implemented (if relevant)
- [ ] All tasks in this userstory are closed (i.e. remaining tasks are moved to other user stories or marked obsolete)

Start by tracing the existing instantiationButton behavior that supports instantiation within the same app, then review the extracted issue and its acceptance criteria. Clarify whether targeting is limited to apps in the same organization, define the development tasks, and verify that successful instantiation redirects correctly with automated or manual tests as appropriate.

Written by the indexing model from the issue text.