Add missing Vue.use(Vuex) in test

Several files are missing Vue.use(Vuex) line resulting in failing several tests when being run separately:

• spec/javascripts/reports/components/modal_open_name_spec.js

See #67206 (moved) for details

Does this MR meet the acceptance criteria?

Conformity

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• [-] Documentation created/updated or follow-up review issue created
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