Interfaces sometimes incorrectly marked as supported

[SebastianZ]

Chrome 128 implements the SnapEvent interface, though does not support its constructor. Therefore, creating a SnapEvent object fails.

Though as the interface is supported, the tests succeed, even for properties that don't exist.

E.g. using the following test

SnapEvent: {
	links: {
		dev: '#snap-events',
		mdnGroup: 'DOM',
	},
	tests: ['foo'],
	interface: function() {
		return new SnapEvent('scrollsnapchange');
	},
},

the property foo is claimed to be supported.

So, when creation of the interface fails, the tests for the properties should also fail.

Sebastian