Implement GH-15680: Enhance zend_dump_op_array to Properly Represent Non-Printable Characters in String Literals #17277
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Replaces GH-15730 as that PR became stale, I'll credit @WangYihang too.
Simpler patch than GH-15730, instead of introducing a new helper, reuse
smart_str_append_escaped(), this also removes the dependency on ext/standard.