Recognise if Product Collection is located inside Cart or Checkout blocks

[kmanijak]

Submission Review Guidelines:

• I have followed the WooCommerce Contributing Guidelines and the WordPress Coding Standards.
• I have checked to ensure there aren't other open Pull Requests for the same update/change.
• I have reviewed my code for security best practices.
• Following the above guidelines will result in quick merges and clear and detailed feedback when appropriate.

Changes proposed in this Pull Request:

In #43997 we implemented a location/context recognition for Product Collection block. Among others, the logic should recognize if we're in scope of Cart and Checkout. While it did a good job with templates, the logic didn't take into account if Product Collection block is placed inside Cart or Checkout blocks.
It will be a common use case for example with Upsells and Cross-Sells collections.

How to test the changes in this Pull Request:

Using the WooCommerce Testing Instructions Guide, include your detailed testing instructions:

Prerequisites to testing:

1. To verify the location, go to Developer Tools -> Network tab
2. Search for: product isproductcollection

Testing steps:

1. Create new post
2. Insert Cart block
3. Somewhere inside Cart block, insert Product Collection block
4. Choose some collection, for example, Featured
5. Expecxted: Verify the proper payload is sent with the request by checking Payload tab.

• location[type]: cart

Changelog entry

• Automatically create a changelog entry from the details below.

Significance

• Patch
• Minor
• Major

Type

• Fix - Fixes an existing bug
• Add - Adds functionality
• Update - Update existing functionality
• Dev - Development related task
• Tweak - A minor adjustment to the codebase
• Performance - Address performance issues
• Enhancement - Improvement to existing functionality

Message

Comment

[github-actions]

Hi @xristos3490, @Aljullu,

Apart from reviewing the code changes, please make sure to review the testing instructions as well.

You can follow this guide to find out what good testing instructions should look like:
https://github.com/woocommerce/woocommerce/wiki/Writing-high-quality-testing-instructions

[xristos3490]

Nice work, @kmanijak! Works as expected!