selftests/rseq: parametrized test: Report/abort on negative concurrency ID

Report and abort when a negative concurrency ID value is observed by the
spinlock test.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221122203932.231377-21-mathieu.desnoyers@efficios.com