Description:
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When calling `DOMChildNode::replaceWith()` on a given node,
If the node is also part of the argument list, PHP either throws a DOMException or just hangs indefinitely.

The bug is present at least in versions 8.0.12 and 8.1.0RC6

Test script:
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// example 1
$doc = new DOMDocument();
$doc->appendChild($target = $doc->createElement('test'));
$target->replaceWith($target); // PHP Fatal error:  Uncaught DOMException: Not Found Error

// example 2
$doc = new DOMDocument();
$doc->appendChild($target = $doc->createElement('test'));
$target->replaceWith($target, 'foo'); // program hangs indefinitely

Expected result:
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Both examples should be handled correctly, like browsers do.