Tech Debt: Improve a11y on SideNav after refactor done by the new product registration work

[aalves08]

Is your feature request related to a problem? Please describe.

With the work done in #16352, there was a minor refactor of the side nav, which caused the rise on nested-interactive problems in our a11y report on our PRs as per https://testhub.ui.rancher.space/accessibility-report/1956.

We need to address this a11y regression and fix all nested-interactive occurrences due to this change.

Describe the solution you'd like

Definitely needs fixing, but also needs a bit of investigation on best course of action. We can't just revert the change as it was a definite improvement on the side nav

Describe alternatives you've considered

Additional context

[github-actions]

🤖 Issue grooming questions

The problem is clearly identified (the nested-interactive a11y regression caused by PR #16352), and the linked accessibility report is very helpful. One thing is needed to make this actionable:

1. Acceptance criteria: What defines "done"? Please add 1–2 concrete, testable criteria. For example:
   • All nested-interactive violations identified in the [accessibility report]((testhub.ui.rancher.space/redacted) are resolved
   • No new a11y violations are introduced by the fix
   • The improvements from PR Work on Product and Pages registration abstraction #16352 are preserved (no regression in the side nav refactor)

This comment was generated automatically to help gather the information needed to groom this issue.

Generated by Daily Issue Grooming · ◷