Issue Description: As follow up task of MGDOBR-843, we should start to use official RHOSE TS/JS SDK for communication between UI and Backend.

There are currently issues preventing form onboarding: https://docs.google.com/document/d/18KpqslJfsItqMqZTo5vWXptBiQ_oOTcy9RPOaeaeP6k/edit#

Acceptance Criteria:

• scripts for fetching and generating RHOSE TS/JS SDK are not more needed in sandbox-ui and are removed

Out of Scope: <Here you need to fill in what is out of scope for this issue and then create new issues if necessary in the backlog for the work>

Additional Information:

• https://github.com/redhat-developer/app-services-sdk-js/releases/
• https://github.com/redhat-developer/app-services-sdk-js/tree/main/packages