[Forwardport] [Bug] Correctly construct Magento\Framework\Phrase

[namlier]

Original Pull Request

#12951
There appears to be a typo in this action.

Description

The Magento\Ui\Controller\Adminhtml\Index\Render action incorrectly calls _ instead of __. This resulted in an error when I was running unit tests. I've searched the codebase for other instances of _() but did not find any.

Fixed Issues (if relevant)

No issue.

Manual testing scenarios

I was not able to manually trigger this error. We spotted the error during our CI build:

Magento\Ui\Test\Unit\Controller\Adminhtml\Index\RenderTest::testExecuteAjaxRequestException
Error: Call to undefined function Magento\Ui\Controller\Adminhtml\Index\_()

/var/www/magento/vendor/magento/module-ui/Controller/Adminhtml/Index/Render.php:91
/var/www/magento/vendor/magento/module-ui/Controller/Adminhtml/AbstractAction.php:62
/var/www/magento/vendor/magento/module-ui/Test/Unit/Controller/Adminhtml/Index/RenderTest.php:226

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 on Travis CI are green)