fix: Add isAirgappedInstance check in Onboarding component (#29860)

## Description
This pull request adds an isAirgappedInstance check in the Onboarding
component. The check ensures that the component behaves correctly in
airgapped instances.

#### PR fixes following issue(s)
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#### Type of change
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- Bug fix (non-breaking change which fixes an issue)
- New feature (non-breaking change which adds functionality)
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- This change requires a documentation update
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## Testing
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#### How Has This Been Tested?
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- [ ] JUnit
- [ ] Jest
- [ ] Cypress
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#### Test Plan
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## Checklist:
#### Dev activity
- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] PR is being merged under a feature flag


#### QA activity:
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have been covered
- [ ] Test plan covers all impacted features and [areas of
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- [ ] Test plan has been peer reviewed by project stakeholders and other
QA members
- [ ] Manually tested functionality on DP
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- [ ] Cypress test cases have been added and approved by SDET/manual QA
- [ ] Added `Test Plan Approved` label after Cypress tests were reviewed
- [ ] Added `Test Plan Approved` label after JUnit tests were reviewed


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **Refactor**
- Updated drop target component to support airgapped instances,
enhancing functionality in restricted network environments.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

app/client/src/layoutSystems/common/dropTarget/DropTargetComponent.tsx

@@ -51,6 +51,7 @@ import { useFeatureFlag } from "utils/hooks/useFeatureFlag";
 import { FEATURE_FLAG } from "@appsmith/entities/FeatureFlag";
 import { useCurrentAppState } from "pages/Editor/IDE/hooks";
 import { EditorState as IDEAppState } from "entities/IDE/constants";
+import { isAirgapped } from "@appsmith/utils/airgapHelpers";
 
 export type DropTargetComponentProps = PropsWithChildren<{
   snapColumnSpace: number;
@@ -82,6 +83,7 @@ function Onboarding() {
   const showStarterTemplatesInsteadofBlankCanvas = useFeatureFlag(
     FEATURE_FLAG.ab_show_templates_instead_of_blank_canvas_enabled,
   );
+  const isAirgappedInstance = isAirgapped();
 
   const currentApplicationId = useSelector(
     (state: AppState) => state.ui.applications.currentApplication?.id,
@@ -91,8 +93,14 @@ function Onboarding() {
     () =>
       showStarterTemplatesInsteadofBlankCanvas &&
       !isMobileCanvas &&
+      isUsersFirstApp &&
+      !isAirgappedInstance,
+    [
+      isMobileCanvas,
       isUsersFirstApp,
-    [isMobileCanvas, isUsersFirstApp, showStarterTemplatesInsteadofBlankCanvas],
+      showStarterTemplatesInsteadofBlankCanvas,
+      isAirgappedInstance,
+    ],
   );
   useEffect(() => {
     (async () => {