Fix Number.is* to accept unknown again #34932
Merged
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Fixes #34931
This essentially reapplies #24436 which incorrectly updated the generated files rather than the sources, and so was wiped out by 2f73986.
Note that this is specifically not the same as #4002, which pertains to the global functions that coerce their arguments and therefore should not accept
unknown
. This change was already accepted 18 months ago, but was applied incorrectly.