READY: Updated IPv8 pointer

[qstokkink]

Fixes #5683
NOTE: anything outside of TestBase will still hide these types of exceptions. This, for example, will still have a hidden error:

def test_a_thing():
    import asyncio
    def this_is_bad():
        raise Exception()
    asyncio.get_event_loop().call_soon(this_is_bad)

This will not:

class MyBeautifulTestCase(TestBase):
    def test_a_thing(self):
        import asyncio
        def this_is_bad():
            raise Exception()
        asyncio.get_event_loop().call_soon(this_is_bad)

This PR uncovers and fixes two tests that were secretly failing:

FAILED src/tribler-core/tribler_core/modules/metadata_store/community/tests/test_gigachannel_community.py::TestGigaChannelUnits::test_gigachannel_search
FAILED src/tribler-core/tribler_core/modules/metadata_store/community/tests/test_remote_query_community.py::TestRemoteQueryCommunity::test_remote_select_subscribed_channels

[sonarcloud]

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