feature: API: migrate from Fusion API to Fusion Apps API

[kjetilhau]

Description

Migrate from the deprecated Fusion Portal API (for apps) to the new and separate Fusion Apps API
Refactoring has also been done in multiple locations
Fixed more tests

• PR title and description are to the point and understandable
• I have performed a self-review of my own code'

Please select version type the purposed change:

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External Relations

• database migration

Changeset

• BREAKING CHANGE: Migrate from the deprecated Fusion Portal API (for apps) to the new and separate Fusion Apps API.
  This results in breaking changes in the API contract. The reason for this is model changes in the new Fusion Apps API. And we prefer modelling 1-1 as best as possible instead of introducing remapping etc. on our end.
• BREAKING CHANGE: Removal of the Fusion Portal Proxy. We no longer provide endpoints for this on the API. All calls to get bundles and app information from Fusion shall go through the ClientBackend
• Fixed more tests
• Refactoring has been done in multiple locations

[changeset-bot]

🦋 Changeset detected

Latest commit: c9b4319

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
fusion-project-portal	Major

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