Macro expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore

macro_rules! expect_pending_htlcs_forwardable_and_htlc_handling_failed_ignore {
    ($node: expr, $expected_failures: expr) => { ... };
}

Clears (and ignores) PendingHTLCsForwardable and HTLCHandlingFailed events

Don’t use this, call expect_pending_htlcs_forwardable_conditions() instead.