Add Pure FlashArray Grafana dashboard

- Add official Pure Storage FlashArray Overview dashboard (v1.0.6) as ConfigMap
- Dashboard source: github.com/PureStorage-OpenConnect/pure-fa-openmetrics-exporter
- Auto-discovered by Grafana sidecar via grafana_dashboard label
- Update ServiceMonitor to add required labels for dashboard compatibility:
  - instance: utilidor (array identifier expected by dashboard)
  - env: production (dashboard template variable requirement)
  - location: homelab (optional dashboard filter)
  - site: main (optional dashboard filter)
- Dashboard includes array capacity, performance, volume stats, host connectivity

cluster/platform/pure-exporter/servicemonitor.yaml

@@ -40,8 +40,28 @@ spec:
       endpoint: 
       - utilidor
     
-    # Relabeling to add FlashArray identifier
+    # Relabeling to add FlashArray identifier and required dashboard labels
     relabelings:
+    # Add 'instance' label (dashboard expects this for array identification)
+    - sourceLabels: [__param_endpoint]
+      targetLabel: instance
+      action: replace
+    # Keep 'array' label for compatibility
     - sourceLabels: [__param_endpoint]
       targetLabel: array
       action: replace
+    
+    # Static labels for dashboard filters
+    metricRelabelings:
+    # Add 'env' label (dashboard template variable requirement)
+    - targetLabel: env
+      replacement: production
+      action: replace
+    # Add 'location' label (optional dashboard filter)
+    - targetLabel: location
+      replacement: homelab
+      action: replace
+    # Add 'site' label (optional dashboard filter)
+    - targetLabel: site
+      replacement: main
+      action: replace