[Doc] split metrics doc into multiple pages to improve indexing (backport #71117) (#71325)

Signed-off-by: DanRoscigno <dan@roscigno.com>
Co-authored-by: Dan Roscigno <dan@roscigno.com>

Author: mergify[bot]

docs/docusaurus/sidebars.json

@@ -514,20 +514,21 @@
                         "administration/management/BE_blacklist",
                         "administration/management/Backup_and_restore",
                         "administration/cluster_snapshot",
-                        {
-                            "type": "category",
-                            "label": "Monitor and Alert",
-                            "link": {
-                                "type": "doc",
-                                "id": "administration/management/monitoring/Monitor_and_Alert"
-                            },
-                            "items": [
-                                "administration/management/monitoring/metrics",
-                                "administration/management/monitoring/metrics-materialized_view",
-                                "administration/management/monitoring/metrics-shared-data",
-                                "administration/management/monitoring/alert"
-                            ]
-                        },
+
+                    { 
+                        "type": "category",
+                        "label": "Monitor and Alert",
+                        "link": {
+                          "type": "doc",
+                          "id": "administration/management/monitoring/Monitor_and_Alert"
+                         },
+                        "items": [
+                            {
+                              "type": "autogenerated",
+                              "dirName": "administration/management/monitoring"
+                            }
+                         ]
+                       },
                         "administration/management/audit_loader",
                         "administration/management/enable_fqdn",
                         "administration/management/timezone",

docs/en/administration/management/monitoring/metric_details/_category_.yml

@@ -0,0 +1,7 @@
+position: 100 # float position is supported
+label: 'General metrics'
+collapsible: true
+collapsed: true
+link:
+  type: generated-index
+  title: 'Metric details'