KVM: arm64: selftests: Test a timer set past the counter's wrap

Program an unmasked timer whose cval sits within long_wait_ms of the
counter's wrap while the guest's counter is at wait_ms, and expect no
interrupt. The guest's counter can't reach it, but a host that applies
the timer's offset by adding it to cval wraps the sum into the past,
and the timer fires at once. The one existing case with a cval past the
wrap, in the sanity checks, runs with the timer masked, so it gets no
interrupt either way.

Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
Link: https://patch.msgid.link/20261007074343.324269-4-fuad.tabba@linux.dev
Signed-off-by: Marc Zyngier <maz@kernel.org>

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