Feat: HTTP componant supports variables (#10432)

### What problem does this PR solve?

HTTP component supports variables. #10382




![http1](https://github.com/user-attachments/assets/196a2a5b-461c-455c-8896-ec2efe7c0a13)


![http2](https://github.com/user-attachments/assets/0ab97cb0-323c-456e-b556-6f416d52e59f)


### Type of change

- [x] New Feature (non-breaking change which adds functionality)

web/src/locales/en.ts

@@ -1397,6 +1397,8 @@ This auto-tagging feature enhances retrieval by adding another layer of domain-s
       cleanHtml: 'Clean HTML',
       cleanHtmlTip:
         'If the response is HTML formatted and only the primary content wanted, please toggle it on.',
+      invalidUrl:
+        'Must be a valid URL or URL with variable placeholders in the format {variable_name} or {component@variable}',
       reference: 'Reference',
       input: 'Input',
       output: 'Output',