irqchip/gic-v5: Remove IRQD_RESEND_WHEN_IN_PROGRESS for ITS IRQs

GICv5 LPI interrupts have an active state hence they cannot retrigger
while the interrupt is being handled.

Therefore, setting the IRQD_RESEND_WHEN_IN_PROGRESS flag on LPIs is
pointless, as the situation this flag caters for cannot happen.

Remove it.

Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/all/20250801-gic-v5-fixes-6-17-v1-3-4fcedaccf9e6@kernel.org