🔄 refactor: Google grounding field to web_search for Consistency (#8285)

- Updated the Google configuration and related schemas to replace 'grounding' with 'web_search' for consistency.
- Adjusted the logic in the getGoogleConfig function to reflect the new naming convention.
- Ensured all references in parameter settings and conversation schemas are updated accordingly.

packages/data-schemas/src/types/convo.ts

@@ -48,7 +48,6 @@ export interface IConversation extends Document {
   reasoning_summary?: string;
   useResponsesApi?: boolean;
   web_search?: boolean;
-  grounding?: boolean;
   // Additional fields
   files?: string[];
   expiredAt?: Date;