Detect when virtualTypes move elsewhere

[fredden]

Description

While working on https://github.com/magento/magento2/pull/32690, it was noticed that a virtualType which is used in multiple modules (namely shellBackground used in both Magento_Cron and Magento_MessageQueue). Moving this to app/etc/di.xml where it belongs triggered an automated test failure from this tool. This pull request aims to handle this case as expected.

Manual testing scenarios

Unit tests are included with this change. Without the code change, these unit tests fail.

Contribution checklist

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

[ihor-sviziev]

@sidolov please merge this pull request

[engcom-Charlie]

@sidolov can you please merge this PR. https://github.com/magento/magento2/pull/32690 is depended on this PR.

[sidolov]

@magento import pr to magento-commerce/magento-semver repository

[m2-github-services]

@sidolov the Pull Request is successfully imported.