@W-15162424: Fix customer product lists error

[alexvuong]

Description

Fix issue describe in #1685.
Root cause, in current implementation, for wishlist, we will call getCustomerProductList to retrive the wishlist, and will sequentially call createProductList to create a new list if none is existing and will update product list cache with data from createProductList mutation.

The error happens because the cache presumes data array is always present from getCustomerProductList accordding to doc. In reality, data will be undefined if the user has no list existing.

Types of Changes

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Documentation update
• Breaking change (could cause existing functionality to not work as expected)
• Other changes (non-breaking changes that does not fit any of the above)

Breaking changes include:

• Removing a public function or component or prop
• Adding a required argument to a function
• Changing the data type of a function parameter or return value
• Adding a new peer dependency to package.json

Changes

• (change1)

How to Test-Drive This PR

• check out code
• npm ci at root
• npm start to start up retail app
• delete all localstorage and cookie
• Navigate to PLP page.
• You should not see any error and confirm that the cache is updated properly after createProductList mutation is successful

Checklists

General

• Changes are covered by test cases
• CHANGELOG.md updated with a short description of changes (not required for documentation updates)

Accessibility Compliance

You must check off all items in one of the follow two lists:

• There are no changes to UI

or...

• Changes were tested with a Screen Reader (iOS VoiceOver or Android Talkback) and had no issues
• Changes comply with WCAG 2.0 guidelines levels A and AA
• Changes to common UI patterns and interactions comply with WAI-ARIA best practices

Localization

• Changes include a UI text update in the Retail React App (which requires translation)

[kevinxh]

Could you please add a unit test to prevent regression please 🙏🙏🙏