Hide Certificates table if vai is enabled

[richard-cox]

Summary

Fixes #11524

Occurred changes and/or fixed issues

• The Cluster Dashboard --> Certificates Tab --> Certificates list uses a filter that is not compatible with the Vai backed api
• So hide the tab when vai is enabled

Technical notes summary

• This is a 2.9 issue only, in 2.10 the table should be updated to handle the different way of filtering

Areas or cases that should be tested

As per issue

Checklist

• The PR is linked to an issue and the linked issue has a Milestone, or no issue is needed
• The PR has a Milestone
• The PR template has been filled out
• The PR has been self reviewed
• The PR has a reviewer assigned
• The PR has automated tests or clear instructions for manual tests and the linked issue has appropriate QA labels, or tests are not needed
• The PR has reviewed with UX and tested in light and dark mode, or there are no UX changes

[aalves08]

Tested this and all LGTM. With vai enabled, tab doesn't appear. Disabled vai and it appeared again.

The only comment is that if the milestone 2.9-next1 is correct, then I think the branch should be release/2.9 🤔

[aalves08]

LGTM