Crash: Unknown Source - com.duckduckgo.app.browser.defaultbrowsing.prompts.store.DefaultBrowserPromptsDataStore$Stage.valueOf (#6642)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/1200905986587319/task/1211115648433751?focus=true

### Description
Rename DataStore for default browser prompts.

### Steps to test this PR

1/ Simulate a used in CONVERTED stage
- [x] Checkout develop.
- [x] Apply the patch attached to the task.
- [x] Install from this branch with the patch.
- [x] Skip onboarding  - this will put you in the CONVERTED state.
- [x] Close the app.
- [x] Discard the patch changes, checkout develop and install from it.
- [x] Open the app.
- [x] Notice it crashes immediately.

2/ Test the fix
- [x] Checkout from this branch.
- [x] Install the app over the previous one (update).
- [x] Open the app.
- [x] Notice it doesn't crash.

### NO UI changes

Author: anikiki

app/src/main/java/com/duckduckgo/app/browser/defaultbrowsing/prompts/di/DefaultBrowserPromptsModule.kt

@@ -32,7 +32,7 @@ import javax.inject.Qualifier
 object DefaultBrowserPromptsModule {
 
     private val Context.defaultBrowserPromptsDataStore: DataStore<Preferences> by preferencesDataStore(
-        name = "default_browser_prompts",
+        name = "default_browser_prompts_datastore",
     )
 
     @Provides