Migrate analytics REST API requests for DORA metrics to Graphql

Background

Value stream analytics and CI/CD Analytics use the REST api endpoints, we have been slowly improving the Graphql endpoints through the work in [Feature flag] Rollout of `vsd_graphql_dora_and... (#409499 - closed), Exec dashboards: expose all flow metrics via Gr... (#387162 - closed) and Exec dashboards: Refactor API requests from RES... (#384560 - closed)

TODO

• Investigate if the current graphql endpoints can cover the current use cases
  • Value Stream Analytics
  • CI/CD Analytics
• Replace REST api requests with Graphql
  • Value Stream Analytics
  • CI/CD Analytics
• Migrate Vuex stores to Apollo - (this should be a separate issue)
• Decouple charts from Vuex
  • Duration chart + Duration overview chart
  • Type of work / tasks by type chart
• Decouple create value stream form from Vuex
• Decouple VSA filters from Vuex

Potential issues

• Date range / aggregation issues - #405146 (potential blocker)
• Overfetching data, can we / do we need to exclude certain metrics from a request?