test(quantic): playwright e2e and unit tests created for quantic case…

… classification component (#4967)

## [SFINT-5792](https://coveord.atlassian.net/browse/SFINT-5792)

### Unit tests and E2E tests added for the Quantic Case Classification
compoment:


https://github.com/user-attachments/assets/6384b001-b3ce-46a4-93b8-a0089866d9ec



[SFINT-5792]:
https://coveord.atlassian.net/browse/SFINT-5792?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

---------

Co-authored-by: Simon Milord <simon.milord@gmail.com>
Co-authored-by: Etienne Rocheleau <erocheleau@coveo.com>

packages/quantic/cypress/e2e/default-1/case-classification/case-classification-selectors.ts

@@ -56,7 +56,7 @@ export const CaseClassificationSelectors: CaseClassificationSelector &
       .eq(idx),
   error: () =>
     CaseClassificationSelectors.get().find(
-      '[data-cy="case-classification-error-message"]'
+      '[data-testid="case-classification-error-message"]'
     ),
   loadingSpinner: () =>
     CaseClassificationSelectors.get().find('lightning-spinner'),