Do not suggest methods from nested interfaces #1418

[volivan239]

Description

Fixed a bug that lead to members from nested interfaces/abstract classes to be shown in members list

Fixes #1418

Type of Change

Please delete options that are not relevant.

• Minor bug fix (non-breaking small changes)

How Has This Been Tested?

Manual Scenario

Tested on example from issue -- works as expected (nested interface is still shown in member list even though it has no appropriate methods, because we still don't go deeper at this stage).

Checklist (remove irrelevant options):

This is the author self-check list

• The change followed the style guidelines of the UTBot project
• Self-review of the code is passed
• The change contains enough commentaries, particularly in hard-to-understand areas
• New documentation is provided or existed one is altered
• No new warnings
• New tests have been added
• All tests pass locally with my changes