Changes proposed in this Pull Request:

Closes #32635.

• Adds ExPlat API calls for experiment assignment query for both woocommerce_products_task_layout_card and woocommerce_products_task_layout_stacked experiment
• Adds the experiment condition prior loading experimental product task fills

How to test the changes in this Pull Request:

Prerequisite

1. Install WooCommerce Admin Test Helper
2. Go to Tools > WCA Test Helper > Features
3. Enable experimental-products-task
4. Make sure your site has woocommerce_allow_tracking option set to yes

Testing control

1. Navigate to WooCommerce > Home
2. Go to "Add products" task
3. Observe the old products task is displayed

Testing card layout

1. Install WooCommerce Admin Test Helper
2. Go to Tools > WCA Test Helper > Experiments
3. Enable treatment for woocommerce_products_task_layout_card
4. Navigate to WooCommerce > Home
5. Go to "Add products" task
6. Observe new products task with card layout

Testing stacked layout

1. Install WooCommerce Admin Test Helper
2. Go to Tools > WCA Test Helper > Experiments
3. Enable treatment for woocommerce_products_task_layout_stacked and disable woocommerce_products_task_layout_card if required
4. Navigate to WooCommerce > Home
5. Go to "Add products" task
6. Observe new products task with stacked layout

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.