Support fields that are written in the `@Ignored` annotation in the `UnmappedTargetPropertiesInspection`

[thunderhook]

With MapStruct 1.7.0 it is possible to provide ignored arguments with the new annotation @Ignored:

• https://github.com/mapstruct/mapstruct/issues/1958

The UnmappedTargetPropertiesInspection needs to consider them, else we would get false warnings.

This can already be implemented before 1.7.0 is released.