build: configure Jasmine to allow duplicate describe block names

This is needed as there are duplicate describe calls for the same builder, which is not allowed in Jasmine 6.

(cherry picked from commit 346973a)

Author: alan-agius4

modules/testing/builder/src/jasmine-helpers.ts

@@ -40,6 +40,9 @@ export function describeBuilder<T>(
     optionSchema,
   });
 
+  // This is needed as there are multiple describe calls for the same builder.
+  jasmine.getEnv().configure({ forbidDuplicateNames: false });
+
   describe(options.name || builderHandler.name, () => {
     beforeEach(async () => {
       harness.resetProjectMetadata();