Feat: Filter the agent form's large model list by type #3221 (#9049)

### What problem does this PR solve?

Feat: Filter the agent form's large model list by type #3221

### Type of change


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

web/src/pages/agent/form/components/query-variable.tsx

@@ -55,6 +55,7 @@ export function QueryVariable({
             <SelectWithSearch
               options={finalOptions}
               {...field}
+              allowClear
             ></SelectWithSearch>
           </FormControl>
           <FormMessage />