Update repository router to be compatible with Vue3 mode

What does this MR do and why?

Refactor Repository router to be compatible with Vue3 mode.

References

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• Fix spec/frontend/repository/router_spec.js

MR acceptance checklist

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Before	After
n/a	n/a

How to set up and validate locally

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Make sure the pipeline passes after tests have been removed from quarantined_vue3_specs.txt