When validating `enum` values as `integer` or `number`, consider a number with a zero fractional part to be equivalent to an integer of the same value.
In `rest_are_values_equal()`, when comparing two values of type `int` or `float` (in any combination), first cast both of them to `float` and then compare.
This matches some test cases from the official JSON Schema test suite.
Follow-up to [50010].
Props yakimun, stefanjoebstl, TimothyBlynJacobs, rachelbaker.
Fixes#52932.
git-svn-id: https://develop.svn.wordpress.org/trunk@50653 602fd350-edb4-49c9-b593-d223f7449a82