fix(catalog): correct getCollection() return type docblock

[lbajsarowicz]

Description (*)

Fixed incorrect return type documentation in Magento\Catalog\Ui\DataProvider\Product\Related\AbstractDataProvider::getCollection().

The method was documented via @inheritdoc to return \Magento\Framework\Model\ResourceModel\Db\Collection\AbstractCollection, but it actually returns \Magento\Catalog\Model\ResourceModel\Product\Collection which inherits from the EAV collection hierarchy, not the Framework DB collection.

Related Pull Requests

Fixed Issues (if relevant)

1. Fixes Magento\Catalog\Ui\DataProvider\Product\Related\AbstractDataProvider::getCollection() is documented as returning incorrect type #40152

Manual testing scenarios (*)

1. Verify PHPDoc tools correctly identify the return type
2. Run existing unit tests in AbstractDataProviderTestCase - they already assert the correct return type

Questions or comments

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)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)

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[lbajsarowicz]

@magento run all tests