Add new api-version in go SDK for operationalinsights (Azure#11213)

* Add new api-version in go SDK for operationalinsights

* Trying to resolve the modeler error

* unify another description

* Fix modeler issue

* Fix another description

* change some statement

specification/operationalinsights/resource-manager/Microsoft.OperationalInsights/preview/2019-08-01-preview/Clusters.json

@@ -581,7 +581,7 @@
       "in": "query",
       "required": true,
       "type": "string",
-      "description": "Client Api Version."
+      "description": "The client API version."
     },
     "ResourceGroupNameParameter": {
       "name": "resourceGroupName",

specification/operationalinsights/resource-manager/Microsoft.OperationalInsights/preview/2019-08-01-preview/LinkedServices.json

@@ -309,7 +309,7 @@
       "in": "query",
       "required": true,
       "type": "string",
-      "description": "Client Api Version."
+      "description": "The client API version."
     },
     "ResourceGroupNameParameter": {
       "name": "resourceGroupName",

specification/operationalinsights/resource-manager/Microsoft.OperationalInsights/preview/2019-08-01-preview/OperationalInsights.json

@@ -637,7 +637,7 @@
       "in": "path",
       "required": true,
       "type": "string",
-      "description": "The workspace's resource subscription ID."
+      "description": "Gets subscription credentials which uniquely identify Microsoft Azure subscription. The subscription ID forms part of the URI for every service call."
     },
     "ApiVersionParameter": {
       "name": "api-version",
@@ -652,7 +652,7 @@
       "required": true,
       "type": "string",
       "x-ms-parameter-location": "method",
-      "description": "The workspace's resource group name.",
+      "description": "The name of the resource group to get. The name is case insensitive.",
       "pattern": "^[-\\w\\._\\(\\)]+$",
       "minLength": 1,
       "maxLength": 90

specification/operationalinsights/resource-manager/readme.go.md

@@ -15,6 +15,7 @@ go:
 batch:
   - tag: package-2015-03
   - tag: package-2015-11-preview
+  - tag: package-2019-08-preview
   - tag: package-2020-03-preview
   - tag: package-2020-08
 ```
@@ -28,6 +29,15 @@ Please also specify `--go-sdk-folder=<path to the root directory of your azure-s
 output-folder: $(go-sdk-folder)/services/$(namespace)/mgmt/2015-03-20/$(namespace)
 ```
 
+### Tag: package-2019-08-preview and go
+
+These settings apply only when `--tag=package-2019-08-preview --go` is specified on the command line.
+Please also specify `--go-sdk-folder=<path to the root directory of your azure-sdk-for-go clone>`.
+
+``` yaml $(tag) == 'package-2019-08-preview' && $(go)
+output-folder: $(go-sdk-folder)/services/preview/$(namespace)/mgmt/2019-08-01-preview/$(namespace)
+```
+
 ### Tag: package-2015-11-preview and go
 
 These settings apply only when `--tag=package-2015-11-preview --go` is specified on the command line.