fix: [IABT-1515] Fix date format in FCI data sharing screen (#5365)

## Short description
This PR updates `FciDataSharingScreen` using a specific function for the
fiscal code birthday rendering. The birthday is an ISO8601 format for
midnight and It returns the date in short format.

## List of changes proposed in this pull request
- Update `FciDataSharingScreen`

## How to test
Using io-dev-api-server to start a signing flow. The birthdate should
show correctly.

Co-authored-by: LazyAfternoons <[email protected]>

ts/features/fci/screens/valid/FciDataSharingScreen.tsx

@@ -31,7 +31,7 @@ import { IOStyles } from "../../../../components/core/variables/IOStyles";
 import { withValidatedEmail } from "../../../../components/helpers/withValidatedEmail";
 import ScreenContent from "../../../../components/screens/ScreenContent";
 import { trackFciUserDataConfirmed, trackFciUserExit } from "../../analytics";
-import { localeDateFormat } from "../../../../utils/locale";
+import { formatFiscalCodeBirthdayAsShortFormat } from "../../../../utils/dates";
 import { fciEnvironmentSelector } from "../../store/reducers/fciEnvironment";
 
 const styles = StyleSheet.create({
@@ -135,10 +135,7 @@ const FciDataSharingScreen = (): React.ReactElement => {
                 <ListItemComponent
                   testID="FciDataSharingScreenBirthDateTestID"
                   title={I18n.t("features.fci.shareDataScreen.birthDate")}
-                  subTitle={localeDateFormat(
-                    birthDate,
-                    I18n.t("global.dateFormats.shortFormat")
-                  )}
+                  subTitle={formatFiscalCodeBirthdayAsShortFormat(birthDate)}
                   hideIcon
                 />
               )}