Merge branch 'release/2.0.x' into feature/5062-event-registration-main

...App/src/main/res/values-de/event_registration_strings.xml

...rn-App/src/main/res/values/event_registration_strings.xml

...Protocol-Buffer/src/main/proto/internal/evreg/event.proto

...uffer/src/main/proto/internal/evreg/poster_template.proto

...Protocol-Buffer/src/main/proto/internal/pt/check_in.proto

.../src/main/proto/internal/pt/qr_code_poster_template.proto

...ol-Buffer/src/main/proto/internal/pt/trace_location.proto

...col-Buffer/src/main/proto/internal/pt/trace_warning.proto

...l-Buffer/src/main/proto/internal/submission_payload.proto

...uffer/src/main/proto/internal/v2/app_config_android.proto

...ol-Buffer/src/main/proto/internal/v2/app_config_ios.proto

.../src/main/proto/internal/v2/key_download_parameters.proto

.../main/proto/internal/v2/presence_tracing_parameters.proto

translation_v2.json