Hide AKS, EKS, and GKE cards when their kontainer drivers are deactivated

[mantis-toboggan-md]

Summary

Fixes #12898

Occurred changes and/or fixed issues

This PR updates the AKS, EKS, and GKE ui extensions to hide their respective cluster creation cards when their kontainer driver is deactivated.

Technical notes summary

The PR changes the behavior of the disabled property of the ClusterProvisioner class so that it aligns with what happens when a node/kontainer driver with custom ui is deactivated. Rather than showing disabled cards the cards are gone entirely.

Areas or cases that should be tested

• disable aks, eks, gke kontainer drivers and verify that the associated card is gone from the cluster creation page after each is disabled
• re-enable those providers and verify that the cards are back
• verify that clicking the cards loads the newer vue ui

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

[richard-cox]

I've left three comments to be resolved, though none are blocking this from merging and can be tracked in issues for later.

let me know if you'd like me to do / split between us some of the nit picky ones!

[richard-cox]

Ok, #12925 should fix the failing storybook gate. Once that merges this just needs a rebase and can go in.

@mantis-toboggan-md Given backports might also be affected I'd be ok with cherry-picking the commit from that PR and included it in the backport PRs. Does that sound ok your side?