itest: expect failure on direct rfq peer btc invoices #1917

Job	Run time
check commits	5m 24s
integration test	21m 39s
backend build on ubuntu-latest	9m 7s
lint	6m 7s
RPC proto compilation check	8m 58s
backend build on windows-latest	16m 17s
backend build on macOS-latest	8m 46s
frontend tests on ubuntu-latest	4m 58s
check release notes updated	3s
unit tests	5m 13s
frontend tests on windows-latest	8m 26s
frontend tests on macOS-latest	5m 51s
unit-race	6m 25s
	1h 47m 14s

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