fix(ui): respect Application destination.name in cluster summary calculation

[daftping]

Application SUMMARY did not respect Applications which use destination name instead of server.

argocd app list
NAME               CLUSTER
argocd/guestbook   in-cluster
argocd/guestbook2  kind-1
argocd/guestbook3  https://127.0.0.1:36931

Before After

Checklist:

• [X] Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this does not need to be in the release notes.
• [ ] The title of the PR states what changed and the related issues number (used for the release note).
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