Draft: Spike: Shared dashboard visualisations (single stat) support for VSD datasource

What does this MR do and why?

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

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Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

Example yaml config

diff --git a/ee/lib/gitlab/analytics/value_stream_dashboard/dashboards/value_streams_dashboard.yaml b/ee/lib/gitlab/analytics/value_stream_dashboard/dashboards/value_streams_dashboard.yaml
index efff83a0339a..7faca44d7628 100644
--- a/ee/lib/gitlab/analytics/value_stream_dashboard/dashboards/value_streams_dashboard.yaml
+++ b/ee/lib/gitlab/analytics/value_stream_dashboard/dashboards/value_streams_dashboard.yaml
@@ -6,7 +6,7 @@ panels:
     visualization: dora_chart
     title: Metrics comparison for %{namespaceName} %{namespaceType}
     gridAttributes:
-      yPos: 1
+      yPos: 2
       xPos: 0
       width: 12
       height: 6
@@ -20,11 +20,43 @@ panels:
       width: 12
       height: 1
     options: {}
+  - id: 4
+    visualization: deployment_frequency_over_time
+    title: Deployment frequency
+    gridAttributes:
+      yPos: 1
+      xPos: 0
+      width: 3
+      height: 1
+  - id: 5
+    visualization: lead_time_for_changes_over_time
+    title: Lead time
+    gridAttributes:
+      yPos: 1
+      xPos: 3
+      width: 3
+      height: 1
+  - id: 6
+    visualization: time_to_restore_service_over_time
+    title: TTRS - time to restore
+    gridAttributes:
+      yPos: 1
+      xPos: 6
+      width: 3
+      height: 1
+  - id: 7
+    visualization: change_failure_rate_over_time
+    title: Change failure rate
+    gridAttributes:
+      yPos: 1
+      xPos: 9
+      width: 3
+      height: 1
   - id: 3
     visualization: dora_performers_score
     title: DORA performers score for %{namespaceName} %{namespaceType}
     gridAttributes:
-      yPos: 7
+      yPos: 9
       xPos: 0
       width: 12
       height: 4

Related to #442335