Remove woocommerce-admin/tests

[chihsuan]

All Submissions:

• Have you followed the WooCommerce Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

Closes #32619.

Removed the woocommerce-admin tests folder since we have moved them into the core.

How to test the changes in this Pull Request:

All Github actions should pass.

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully run tests with your changes locally?
• Have you created a changelog file by running pnpm nx affected --target=changelog?

FOR PR REVIEWER ONLY:

• I have reviewed that everything is sanitized/escaped appropriately for any SQL or XSS injection possibilities. I made sure Linting is not ignored or disabled.

[rjchow]

Thanks! Visually confirmed that the e2e tests have been moved to woocommerce/tests/e2e/specs and that they are running on Github actions

[github-actions]

Hi @chihsuan, thanks for merging this pull request. Please take a look at these follow-up tasks you may need to perform:

• Add the release: add testing instructions label