chore: fix broken test due to Firefox update

[nolanlawson]

Details

Firefox tests are newly failing due to:

Firefox 121.0 (Windows 10) component decorators api non-LightningElement `this` when calling accessor getterSetter setter - external FAILED
	Expected function to throw TypeError with a message matching /(undefined is not an object|Right side of assignment cannot be destructured|vm is undefined|undefined is not a VM|Cannot destructure property '(getHook|setHook)'|Cannot read properties of undefined)/, but it threw TypeError with message 'undefined has no properties'.

This fixes that.

Does this pull request introduce a breaking change?

• ✅ No, it does not introduce a breaking change.

Does this pull request introduce an observable change?

• ✅ No, it does not introduce an observable change.

GUS work item