test: Check that peers with forcerelay permission are not asked to feefilter

Summary:
Backport of core#19198.

The signature of util.connect_nodes in our codebase differs from core,
so this has been adapted accordingly.

Test Plan:

ninja check-extended

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D9546