Sync UI and update templates (#8800)

docs/en/setup/backend/backend-vm-monitoring.md

-# VMs monitoring 
+# Linux Monitoring
 SkyWalking leverages Prometheus node-exporter to collect metrics data from the VMs, and leverages OpenTelemetry Collector to transfer the metrics to
 [OpenTelemetry receiver](opentelemetry-receiver.md) and into the [Meter System](./../../concepts-and-designs/meter.md).  
-We define the VM entity as a `Service` in OAP, and use `vm::` as a prefix to identify it.  
+VM entity as a `Service` in OAP, and on the `Layer: OS_LINUX`.  
 
 ## Data flow
 1. The Prometheus node-exporter collects metrics data from the VMs.
@@ -35,7 +35,7 @@ We define the VM entity as a `Service` in OAP, and use `vm::` as a prefix to ide
 ## Customizing 
 You can customize your own metrics/expression/dashboard panel.   
 The metrics definition and expression rules are found in `/config/otel-oc-rules/vm.yaml`.  
-The dashboard panel confirmations are found in `/config/ui-initialized-templates/vm.yml`.
+The dashboard panel confirmations are found in `/config/ui-initialized-templates/os_linux`.
 
 ## Blog
 For more details, see blog article [SkyWalking 8.4 provides infrastructure monitoring](https://skywalking.apache.org/blog/2021-02-07-infrastructure-monitoring/).

oap-server/server-starter/src/main/resources/ui-initialized-templates/faas/faas-root.json

@@ -22,7 +22,7 @@
       "children": [
         {
           "x": 0,
-          "y": 2,
+          "y": 3,
           "w": 24,
           "h": 52,
           "i": "1",
@@ -209,7 +209,7 @@
           "x": 0,
           "y": 0,
           "w": 24,
-          "h": 2,
+          "h": 3,
           "i": "2",
           "type": "Text",
           "metricTypes": [

oap-server/server-starter/src/main/resources/ui-initialized-templates/virtual_database/virtual-database-root.json

@@ -71,7 +71,7 @@
             "content": "Observe the Virtual Database which is conjectured by language agent through various plugins.",
             "fontSize": 14,
             "textAlign": "left",
-            "url": "test"
+            "url": "https://skywalking.apache.org/docs/main/latest/en/setup/service-agent/virtual-database/"
           },
           "moved": false
         }

skywalking-ui @ e955c913

-Subproject commit 4e8aa062f5a0b03c74fdaf5d7a3578ce3441487a
+Subproject commit e955c91323ef14449d96a402f9c000c3d77355bd