Remove jQuery from layout_nav tabs

Background

The following discussion from !114758 (merged) should be addressed:

• @ekigbo started a discussion: (+1 comment)

  nitpick: @eduardosanz it would be great to add a follow up to remove this jquery and just use native JS

• @eduardosanz discussion

  Even better would be to replace this by the gitlab-ui's Tab component: https://gitlab-org.gitlab.io/gitlab-ui/?path=/story/base-tabs--with-scroll

Problem

• We are including some jquery for some seemingly simple selections that could be replaced
• We could potentially upgrade these tabs to use a gitlab-ui component

Solution

• Preferred solution: Migrate the tabs to use the gitlab-ui component
• Another solution: Replace the jquery with native JS