[BUG]Out of stock products should also be considered as unavailable products and be removed from cart and checkout page

[alexvuong]

Summary

Some products can be out of stock during shopping journey. Currently, only offline products are considered unavailable and get removed from cart/checkout page.

Steps To Reproduce

• Add an item to cart
• Go to BM and allocated zero with the inventory record of the product so that ATS is zero
  
• Go back to cart/check out page
• Product is not removed from the page

Expected result

Out of stock item should be removed from cart/checkout page
Describe what should have happened.

Actual result

Out of stock item is not removed
Describe what actually happened.

System Information (as applicable)

Browser:
Node version:
pwa-kit version:
Desktop OS:
Mobile Device Info:

Additional information

Feel free to attach a screenshot.

[git2gus]

This issue has been linked to a new work item: W-15586246