Skip/ignore code errors in vendor folder

### Description

Some of third-party codes contain errors, that not affect the project and it is not necessary to mark the project as that contains error, when the error is in the vendor folder.

### Use case/motivation

To know when the project is OK or not :)

### Related issues

https://github.com/apache/netbeans/issues/4610

### Are you willing to submit a pull request?

I want to, but I'm not a Java developer

### Code of Conduct

Yes

Start by reviewing related issue #4610 and tracing how NetBeans reports code errors in projects. Define done as errors originating in a vendor folder being ignored for project error status while other project errors remain reported; the payload names no files or tests to run.

Written by the indexing model from the issue text.