refactor(dashboard): Refactor kustomize manifests for Central Dashboard components

[alokdangre]

This PR refactors the Kustomize manifests for the dashboard components to follow the standard Kubeflow manifest structure from notebooks v2. as per (Issue #180).
I have changed the labels as said in issue

folder structure

1. Central Dashboard

components/centraldashboard/manifests/kustomize/

├── base/
│   ├── clusterrole-binding.yaml
│   ├── clusterrole.yaml
│   ├── configmap.yaml
│   ├── deployment.yaml
│   ├── kustomization.yaml
│   ├── network-policy.yaml
│   ├── params.env
│   ├── role-binding.yaml
│   ├── role.yaml
│   ├── service-account.yaml
│   └── service.yaml
├── components/
│   └── istio/
│       ├── authorizationpolicy.yaml
│       ├── kustomization.yaml
│       ├── params.yaml
│       └── virtual-service.yaml
└── overlays/
    ├── istio/
    │   └── kustomization.yaml
    └── kserve/
        ├── patches/
        │   └── configmap.yaml
        └── kustomization.yaml

---

2. Angular central dashboard

components/centraldashboard-angular/manifests/kustomize/

├── base/
│   ├── clusterrole-binding.yaml
│   ├── clusterrole.yaml
│   ├── configmap.yaml
│   ├── deployment.yaml
│   ├── kustomization.yaml
│   ├── network-policy.yaml
│   ├── params.env
│   ├── role-binding.yaml
│   ├── role.yaml
│   ├── service-account.yaml
│   └── service.yaml
├── components/
│   └── istio/
│       ├── authorizationpolicy.yaml
│       ├── kustomization.yaml
│       ├── params.yaml
│       └── virtual-service.yaml
└── overlays/
    ├── istio/
    │   └── kustomization.yaml
    └── kserve/
        ├── patches/
        │   └── configmap.yaml
        └── kustomization.yaml

closes: #180

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[thesuperzapper]

/ok-to-test