BC-147 - add dispatch job after build and push job for the main branch

[mamutmk5]

Description

Add dispatch job after build and push job for the main branch.

Links to Tickets or other pull requests

https://ticketsystem.hpi-schul-cloud.org/browse/BC-147

Changes

Add dispatch job after build and push job for the main branch.

Datasecurity _{^{details on Confluence}}

Deployment

New Repos, NPM pakages or vendor scripts

Approval for review

• [x] All points were discussed with the ticket creator, support-team or product owner. The code upholds all quality guidelines from the PR-template.

Notice: Please remove the WIP label if the PR is ready to review, otherwise nobody will review it.

Link to Definiton of Done

More and detailed information on the definition of done can be found on Confluence