984: Filtered generated folder from reference resolving results

[bohdan-harniuk]

Description (*)

Fixed issue with wrong references resolved for a class if Magento 2 proxy was generated for it.
In this case the PHPStorm filters references resolved from the /vendor/ directory if there is any result from the project itself (generated folder in this case).

Before:

ℹ️ Additional side affect provided in the related issue: #984.

After:

Fixed Issues (if relevant)

1. Fixes [UCT] Error is not displayed if the generated class of the method called exists #984

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 integration/functional tests (if applicable)
• All automated tests passed successfully (all builds are green)