Fix method to get service plan resource group, which may make web app creation always create service plan in new resource group

Author: Flanker-MSFT

PluginsAndFeatures/azure-toolkit-for-intellij/azure-intellij-plugin-appservice-java/src/main/java/com/microsoft/azure/toolkit/intellij/legacy/appservice/AppServiceInfoAdvancedPanel.java

@@ -104,7 +104,7 @@ public T getValue() {
         Optional.ofNullable(selectorServicePlan.getValue()).map(AppServicePlan::getPricingTier).ifPresent(result::pricingTier);
         Optional.ofNullable(selectorServicePlan.getValue())
                 .map(plan -> plan.isDraftForCreating() ? result.getResourceGroup() : plan.getResourceGroupName())
-                .ifPresent(result::resourceGroup);
+                .ifPresent(result::servicePlanResourceGroup);
         final Boolean isDocker = Optional.ofNullable(selectorRuntime.getValue()).map(Runtime::isDocker).orElse(false);
         if (isDocker) {
             final ContainerAppDraft.ImageConfig image = chkUseQuickStart.isSelected() ? QUICK_START_IMAGE : pnlContainer.getValue();