Token prefixes: Fix issue when resetting feed tokens in rake task

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What does this MR do and why?

When resetting all feed tokens using the rake task tokens:reset_all_feed, the instance prefix for tokens was ignored. This MR fixes that behaviour.

🛠️ with ❤️ at Siemens

References

• Instance token prefix Docs
• Allow custom instance token prefix for all toke... (#388379)

How to set up and validate locally

1. Enable feature flag via rails c:

Feature.enable(:custom_prefix_for_all_token_types)

BEFORE applying this MR:

2. Check your current feed token: https://gdk.test:3443/-/user_settings/personal_access_tokens It should not contain an instance prefix yet.
3. Now, change the instance wide token prefix: Admin area > General > Account and limit > Instance token prefix, e.g. to mycustomprefix
4. Execute the rake task: bundle exec rake tokens:reset_all_feed
5. Check your feed token again - it should have been changed, but does not contain the instance wide token prefix.

AFTER applying this MR

Same steps as above, however in step 5 you should now see that the feed token contains the instance wide token prefix.

MR acceptance checklist

MR Checklist ( @nwittstruck)

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the javascript style guides
• Conforms to the database guides