[Issue] [PHPDOC] Update argument type in Magento\Customer\Api\Data\CustomerInterface::setConfirmation()

[m2-assistant]

This issue is automatically created based on existing pull request: #40623: [PHPDOC] Update argument type in Magento\Customer\Api\Data\CustomerInterface::setConfirmation()

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Description (*)

This PR fix the bad phpdoc in Magento\Customer\Api\Data\CustomerInterface::setConfirmation(). The argument $confirmation can be null.

Here is an example where the type null is used :

magento2/app/code/Magento/Customer/Model/ForgotPasswordToken/ConfirmCustomerByToken.php

Lines 60 to 66 in 57bad41

	private function resetConfirmation(CustomerInterface $customer): void
	{
	// skip unnecessary address and customer validation
	$customer->setData('ignore_validation_flag', true);
	$customer->setConfirmation(null);
	$this->customerRepository->save($customer);

With PHPSTAN is very complicated to setup the project with level 5 or higher :(

Related Pull Requests

None

Fixed Issues (if relevant)

None

Manual testing scenarios (*)

Setup PHPSTAN with level 5 or higher and run check.

Questions or comments

The quality of Magento code needs to be improved so that it is easier to use the code quality tools (phpstan, rector, ...) ❤️

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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