chore(IT Wallet): [SIW-658] Remove legacy components (#5275)

## Short description
This PR removes legacy components that have either been replaced by
newer versions or have been integrated into the design system library.
Each commit replaces a specific component. 

## List of changes proposed in this pull request
- Replaces `ItwFooterInfoBox` with `ItwTextInfo`;
- Removes `ItwLoadingSpinner.tsx` which has been integrated in the
design system library and also removes the support for both old and new
design system in `ItwLoadingSpinnerOverlay.tsx`;
- Replaces `BadgeButton.tsx` with `TabNavigator` and `TabItem` from the
design system library;
- Replaces `NewH3.tsx` with `H3` from the design system library.

## How to test
Static tests should be enough, optionally check the wallet home screen
tab navigator and a loading screen example.

---------

Co-authored-by: Mario Perrotta <mario.perrotta@pagopa.it>

ts/components/screens/BaseHeader.tsx

@@ -19,7 +19,8 @@ import {
   Icon,
   IconButton,
   HSpacer,
-  IOSpacer
+  IOSpacer,
+  H3
 } from "@pagopa/io-app-design-system";
 import I18n from "../../i18n";
 import { navigateBack } from "../../store/actions/navigation";
@@ -36,7 +37,6 @@ import GoBackButton from "../GoBackButton";
 import SearchButton, { SearchType } from "../search/SearchButton";
 import AppHeader from "../ui/AppHeader";
 import { itWalletEnabled } from "../../config";
-import { NewH3 } from "../../features/it-wallet/components/design/NewH3";
 
 type HelpButtonProps = {
   dark?: boolean;
@@ -389,14 +389,14 @@ class BaseHeaderComponent extends React.PureComponent<Props, State> {
     const { sectionTitle, dark } = this.props;
     return (
       <Left>
-        <NewH3
+        <H3
           accessible={true}
           accessibilityRole="header"
           testID={"screen-content-header-title"}
           color={dark ? "white" : "black"}
         >
           {sectionTitle}
-        </NewH3>
+        </H3>
       </Left>
     );
   };

ts/features/it-wallet/components/ItwLoadingSpinnerOverlay.tsx

@@ -6,12 +6,10 @@ import {
   IOColors,
   LoadingSpinner,
   VSpacer,
-  hexToRgba,
-  useIOExperimentalDesign
+  hexToRgba
 } from "@pagopa/io-app-design-system";
 import customVariables from "../../../theme/variables";
 import { Overlay } from "../../../components/ui/Overlay";
-import ItwLoadingSpinner from "./ItwLoadingSpinner";
 
 const styles = StyleSheet.create({
   main: {
@@ -49,20 +47,13 @@ const ItwLoadingSpinnerOverlay: React.FunctionComponent<Props> = (
     captionSubtitle
   } = props;
 
-  const { isExperimental } = useIOExperimentalDesign();
-
   return (
     <Overlay
       backgroundColor={hexToRgba(IOColors.white, loadingOpacity)}
       foreground={
         isLoading && (
           <View style={styles.main}>
-            {isExperimental ? (
-              <LoadingSpinner size={76} />
-            ) : (
-              <ItwLoadingSpinner color={IOColors.blue} size={76} />
-            )}
-
+            <LoadingSpinner size={76} />
             <VSpacer size={48} />
             <H3
               style={styles.textAlignCenter}