Align [[DefineOwnProperty]], [[Put]] & [[Delete]] with the Web IDL specification for legacy platform objects. This also aligns us with Gecko and Blink.
Pull request: https://github.com/WebKit/WebKit/pull/14205
Committed 264594@main (12544d418716): <https://commits.webkit.org/264594@main> Reviewed commits have been landed. Closing PR #14205 and removing active labels.
<rdar://problem/109896272>