OZG-449 OZG-2293 Add E2E Test; rename meineVorgaenge -> myVorgaenge

...e2e/src/components/navigation/navigation.e2e.component.ts

.../integration/main-tests/navigation/navigation.e2e-spec.ts

.../main-tests/postfach-mail/postfach-mail-error.e2e-spec.ts

.../vorgang-detailansicht/vorgang-zurueckstellen.e2e-spec.ts

goofy-client/apps/goofy-e2e/src/page-objects/header.po.ts

goofy-client/apps/goofy-e2e/src/page-objects/main.po.ts

goofy-client/apps/goofy-e2e/src/support/cypress-helper.ts

goofy-client/apps/goofy-e2e/src/support/user-util.ts

...ion/src/lib/header-container/header/header.component.html

...vigation-item/my-vorgaenge-navigation-item.component.html

...s/navigation/src/lib/navigation/navigation.component.html

...bs/tech-shared/src/lib/service/navigation.service.spec.ts

...nt/libs/tech-shared/src/lib/service/navigation.service.ts

.../libs/vorgang-shared/src/lib/vorgang-list.service.spec.ts

...lient/libs/vorgang-shared/src/lib/vorgang-list.service.ts

goofy-client/libs/vorgang/src/lib/vorgang.module.ts