test(support): add edge-case tuples for preg_replace_array #56937
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This adds three data-provider cases to
providesPregReplaceArrayData()
to cover common edge conditions while staying in plain PHP regex land:Non-sequential numeric keys are consumed in insertion order.
Associative keys are consumed in insertion order (not by key or pointer).
Falsy values ('0', 0, false, null) render as expected → 0|0||.