Configurable stock status is not correct when using custom stock (MSI)

[Kannakiraj123]

Description (*)

This PR fix when MSI enabled to product ,the configurable product status must be updated when a child's product status is changed.

Fixed Issues (if relevant)

1. Fixes #36154

magento/magento2#36154

Manual testing scenarios (*)

• create new source in admin > store > sources, i.e : source A
• create new stock in admin > store > stock, i.e : custom stock
• assign source A to Custom stock, and also assign custom stock to main website
• create new configurable product, i.e : test product
  - add simple product to the configurable product in configuration tab
  - assign simple product to source A
  - fill quantity, i.e : 1
• and save new created configurable product. (in this step the configurable product stock = In Stock)
• now change the simple product :
  - Source Item Status : from In Stock to Out Of Stock
  - Qty : from 1 to 0
  - save simple product
• check configurable product (the stock status is still In Stock, it must be Out Of Stock)

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)

[engcom-Hotel]

Hello @Kannakiraj123,

Thank you for your contribution!

Please resolve the conflicts so that we can move further with this PR.

Thanks

[engcom-Hotel]

Hello @Kannakiraj123,

Gentle reminder to fix the conflicts of this PR.

Thank you