Convert noteable_note_spec.js to Vue test utils

Merged Inactive Account requested to merge winh-noteable_note_spec-vue-test-utils into master

What does this MR do?

Convert spec/javascripts/notes/components/noteable_note_spec.js to use Vue test utils.

Second attempt of This time without breaking EE master. 🎉

What are the relevant issue numbers?

Does this MR meet the acceptance criteria?

Edited by Inactive Account