[JS] Mitigate sdk breakings for Monitor (#44294)

* revert

* update

Author: v-jiaodi

specification/monitor/resource-manager/Microsoft.Insights/Insights/ServiceDiagnosticsSettingsApi/back-compatible.tsp

@@ -8,37 +8,19 @@ using ServiceDiagnosticsSettingsApi;
 
 @@clientLocation(
   ServiceDiagnosticSettingsResources.get,
-  "ServiceDiagnosticSettings",
-  "!javascript"
-);
-@@clientLocation(
-  ServiceDiagnosticSettingsResources.get,
-  "DiagnosticSettings",
-  "javascript"
+  "ServiceDiagnosticSettings"
 );
 @@clientLocation(
   ServiceDiagnosticSettingsResources.createOrUpdate,
-  "ServiceDiagnosticSettings",
-  "!javascript"
-);
-@@clientLocation(
-  ServiceDiagnosticSettingsResources.createOrUpdate,
-  "DiagnosticSettings",
-  "javascript"
+  "ServiceDiagnosticSettings"
 );
 @@clientName(
   ServiceDiagnosticSettingsResources.createOrUpdate::parameters.resource,
   "parameters"
 );
 @@clientLocation(
   ServiceDiagnosticSettingsResources.update,
-  "ServiceDiagnosticSettings",
-  "!javascript"
-);
-@@clientLocation(
-  ServiceDiagnosticSettingsResources.update,
-  "DiagnosticSettings",
-  "javascript"
+  "ServiceDiagnosticSettings"
 );
 @@clientName(
   ServiceDiagnosticSettingsResources.update::parameters.properties,

specification/monitor/resource-manager/Microsoft.Insights/Insights/client.tsp

@@ -1396,7 +1396,7 @@ model MetricSettings {
 @@alternateType(
   ServiceDiagnosticsSettingsApi.MetricSettings,
   MetricSettings,
-  "csharp,java,python"
+  "csharp,java,python,javascript"
 );
 
 /**