Updates internal user flag to reset state (#2438)

Task/Issue URL: https://app.asana.com/0/547792610048271/1206524375402369/f

Description:

Prevent debug menu from showing to non-internal users.
Reset internal user state for all users.

Core/UserDefaultsPropertyWrapper.swift

@@ -83,7 +83,8 @@ public struct UserDefaultsWrapper<T> {
         case autofillCredentialsHasBeenEnabledAutomaticallyIfNecessary =
                 "com.duckduckgo.ios.autofillCredentialsHasBeenEnabledAutomaticallyIfNecessary"
 
-        case featureFlaggingDidVerifyInternalUser = "com.duckduckgo.app.featureFlaggingDidVerifyInternalUser"
+        // .v2 suffix added to fix https://app.asana.com/0/547792610048271/1206524375402369/f
+        case featureFlaggingDidVerifyInternalUser = "com.duckduckgo.app.featureFlaggingDidVerifyInternalUser.v2"
 
         case voiceSearchEnabled = "com.duckduckgo.app.voiceSearchEnabled"