[BREAKINGCHANGE] remove dashbaord resource dependecy

[shahrokni]

Description

There is an ongoing effort to remove the core the dependency and replace them with what we have in the Spec.
This PR removes some of the dependencies (mostly DashboardResource, EphemeralDashboardResource) which have been already mentioned by @Nexucis

How does it replace the dependencies?

The PR introduces a new interface which represents an internal definition of any-Dashboard-Resource named DashboardMinimalResource.

• DashboardResource, EphemeralDashboardResource from EditDatasourcesButton.tsx
• DashboardResource, EphemeralDashboardResource from serializeDashboard.ts
• DashboardResource, EphemeralDashboardResource from LeaveDialog.tsx
• DashboardResource, EphemeralDashboardResource from common.ts
• DashboardResource, EphemeralDashboardResource from dashboard-provider-api.ts
• DashboardResource, EphemeralDashboardResource from DatasourceStoreProvider.tsx
• DashboardResource, EphemeralDashboardResource from useDashboard.tsx
• DashboardResource from dashboard-provider.tsx
• DashboardResource, EphemeralDashboardResource from DashboardApp.tsx
• Some important changes in dashboards/src/context/DashboardProvider/DashboardProvider.tsx

Checklist

• Pull request has a descriptive title and context useful to a reviewer.
• Pull request title follows the [<catalog_entry>] <commit message> naming convention using one of the
  following catalog_entry values: FEATURE, ENHANCEMENT, BUGFIX, BREAKINGCHANGE, DOC,IGNORE.
• All commits have DCO signoffs.

UI Changes

• Changes that impact the UI include screenshots and/or screencasts of the relevant changes.
• Code follows the UI guidelines.
• E2E tests are stable and unlikely to be flaky.
  See e2e docs for more details. Common issues include:
  • Is the data inconsistent? You need to mock API requests.
  • Does the time change? You need to use consistent time values or mock time utilities.
  • Does it have loading states? You need to wait for loading to complete.