Wrap subscription-related navigation links in LazyView (#3576)

Task/Issue URL: https://app.asana.com/0/414235014887631/1208761754194252/f
Tech Design URL:
CC:

Description:

This PR fixes an issue where subscription views were being fully initialized from the settings screen, rather than initializing when being navigated to. This isn't a problem for most of the subscription views, but the VPN view was having all of its various subscribers etc. spun up and reacting to state when they shouldn't have been.

DuckDuckGo/SettingsSubscriptionView.swift

@@ -157,7 +157,7 @@ struct SettingsSubscriptionView: View {
     private var subscriptionDetailsView: some View {
 
         if settingsViewModel.state.subscription.entitlements.contains(.networkProtection) {
-            NavigationLink(destination: NetworkProtectionRootView(), isActive: $isShowingVPN) {
+            NavigationLink(destination: LazyView(NetworkProtectionRootView()), isActive: $isShowingVPN) {
                 SettingsCellView(
                     label: UserText.settingsPProVPNTitle,
                     image: Image("SettingsPrivacyProVPN"),
@@ -167,7 +167,7 @@ struct SettingsSubscriptionView: View {
         }
 
         if settingsViewModel.state.subscription.entitlements.contains(.dataBrokerProtection) {
-            NavigationLink(destination: SubscriptionPIRView(), isActive: $isShowingDBP) {
+            NavigationLink(destination: LazyView(SubscriptionPIRView()), isActive: $isShowingDBP) {
                 SettingsCellView(
                     label: UserText.settingsPProDBPTitle,
                     image: Image("SettingsPrivacyProPIR"),
@@ -178,7 +178,7 @@ struct SettingsSubscriptionView: View {
 
         if settingsViewModel.state.subscription.entitlements.contains(.identityTheftRestoration) {
             NavigationLink(
-                destination: SubscriptionITPView(),
+                destination: LazyView(SubscriptionITPView()),
                 isActive: $isShowingITP) {
                     SettingsCellView(
                         label: UserText.settingsPProITRTitle,
@@ -188,7 +188,7 @@ struct SettingsSubscriptionView: View {
             }
         }
 
-        NavigationLink(destination: SubscriptionSettingsView(configuration: .subscribed, settingsViewModel: settingsViewModel)
+        NavigationLink(destination: LazyView(SubscriptionSettingsView(configuration: .subscribed, settingsViewModel: settingsViewModel))
             .environmentObject(subscriptionNavigationCoordinator)
         ) {
             SettingsCustomCell(content: { manageSubscriptionView })