fix(log_analytics_storage_insights): Parse subscriptionId from worksp…

…aceId

Subscription ID where to create `log_analytics_storage_insights` should
be the same as the Log Analytics Workspace.

When passing a `workspaceId` with a different Azure subscription than
the current one, resource group could not be found:

 Error: creating/updating Storage Insight Config (Subscription: "13-xxxx-aa"
 Resource Group Name: "rg-dev-test"
 Workspace Name: "logaws-dev-test"
 Storage Insight Config Name: "logsi-stdevstoragestoragsjkbl4"): unexpected
  status 404 (404 Not Found) with error: ResourceGroupNotFound:
 Resource group 'rg-dev-test' could not be found.

Fixes #28466

internal/services/loganalytics/log_analytics_storage_insights_resource.go

@@ -54,7 +54,6 @@ func resourceLogAnalyticsStorageInsights() *pluginsdk.Resource {
 
 func resourceLogAnalyticsStorageInsightsCreateUpdate(d *pluginsdk.ResourceData, meta interface{}) error {
 	client := meta.(*clients.Client).LogAnalytics.StorageInsightsClient
-	subscriptionId := meta.(*clients.Client).Account.SubscriptionId
 	ctx, cancel := timeouts.ForCreateUpdate(meta.(*clients.Client).StopContext, d)
 	defer cancel()
 
@@ -67,7 +66,7 @@ func resourceLogAnalyticsStorageInsightsCreateUpdate(d *pluginsdk.ResourceData,
 	if err != nil {
 		return err
 	}
-	id := storageinsights.NewStorageInsightConfigID(subscriptionId, resourceGroup, workspace.WorkspaceName, name)
+	id := storageinsights.NewStorageInsightConfigID(workspace.SubscriptionId, resourceGroup, workspace.WorkspaceName, name)
 
 	if d.IsNewResource() {
 		existing, err := client.StorageInsightConfigsGet(ctx, id)