OZG-7501 add e2e test for forwarding

...onents/vorgang/vorgang-forwarding-dialog.e2e.component.ts

...s/alfa-e2e/src/e2e/main-tests/forwarding/forwarding.cy.ts

alfa-client/apps/alfa-e2e/src/helper/app.helper.ts

...pps/alfa-e2e/src/helper/forwarding/forwarding.executor.ts

.../apps/alfa-e2e/src/helper/forwarding/forwarding.helper.ts

...ps/alfa-e2e/src/helper/forwarding/forwarding.navigator.ts

...ent/apps/alfa-e2e/src/helper/vorgang/vorgang.navigator.ts

...ient/apps/alfa-e2e/src/helper/vorgang/vorgang.verifier.ts

alfa-client/apps/alfa-e2e/src/model/organisationseinheit.ts

...dialog/forwarding-button/forwarding-button.component.html

...g-dialog/forwarding-button/forwarding-button.component.ts

...tainer/forwarding-dialog/forwarding-dialog.component.html