circuitv2: flaky TestReservationFailures/unsupported_protocol

[marten-seemann]

  === RUN   TestReservationFailures/unsupported_protocol
      reservation_test.go:100: 
          	Error Trace:	D:\a\go-libp2p\go-libp2p\p2p\protocol\circuitv2\client\reservation_test.go:100
          	Error:      	"Application error 0x0: peer:12D3KooWDuwgsbf9CcVe1euAXgjn8CxtHKjQdhuLGiJ7Na4NWinE: cannot reserve inbound connection: resource limit exceeded" does not contain "protocol not supported"
          	Test:       	TestReservationFailures/unsupported_protocol
  === RUN   TestReservationFailures/wrong_message_type
  === RUN   TestReservationFailures/unknown_status
  === RUN   TestReservationFailures/invalid_time
  === RUN   TestReservationFailures/invalid_voucher
  --- FAIL: TestReservationFailures (0.64s)
      --- FAIL: TestReservationFailures/unsupported_protocol (0.20s)
      --- PASS: TestReservationFailures/wrong_message_type (0.09s)
      --- PASS: TestReservationFailures/unknown_status (0.08s)
      --- PASS: TestReservationFailures/invalid_time (0.17s)
      --- PASS: TestReservationFailures/invalid_voucher (0.10s)