Bug 38262: Fix VueFramework_spec.ts

Fix the following error:
 Error: The following error originated from your application code, not from Cypress. It was caused by an unhandled promise rejection.

  > JS Warning detected: "[Vue warn]: Unhandled error during execution of watcher callback" "\n" " at <AdditionalFieldsEntry"

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>

t/cypress/integration/VueFramework_spec.ts

@@ -347,6 +347,15 @@ describe("Form features", () => {
             new RegExp("/api/v1/acquisitions/vendors/(?!config$).+"),
             vendor
         ).as("get-vendor");
+        cy.intercept(
+            "GET",
+            "/api/v1/acquisitions/vendors/extended_attribute_types*",
+            {
+                body: [],
+                statusCode: 200,
+            }
+        );
+
         cy.get("#name").type(vendor.name);
         cy.get("#toolbar button").contains("Save").click();
         cy.wait("@get-vendor");