refactor(other): refactor test workflows

Created by: mahula

🍰 Pullrequest

Issues

• relates #6138 (closed)

Todo

• devide test workflow into test-backend.yml, test-e2e.yml, and test-webapp.yml
• unit test coverage checks:
  • configure jest for coverage check
  • remove coverage check jobs from backend and webapp workflows
• add file filters (backend, docker, and webapp)
• use the file change check job in workflows