Implement delete_property_or_throw

[jedel1043]

Some functions of Array use remove_property as an equivalent for DeletePropertyOrThrow ( O, P ), but this function is not spec compliant in some cases, as it silently fails when there's an error deleting a property.

This PR changes the following:

• Adds the function delete_property_or_throw for GcObject
• Adds the function delete_property_or_throw for Value (temporarily until we separate Objects from Values)
• Replaces instances of remove_property with delete_property_or_throw in Array functions

[Razican]

Test262 conformance changes:

Test result	master count	PR count	difference
Total	78,897	78,897	0
Passed	26,940	26,942	+2
Ignored	15,628	15,628	0
Failed	36,329	36,327	-2
Panics	1	1	0
Conformance	34.15%	34.15%	+0.00%

Fixed tests:

test/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-target.js [strict mode] (previously Failed)
test/built-ins/Array/prototype/copyWithin/return-abrupt-from-delete-target.js (previously Failed)
test/built-ins/Map/prototype/keys/returns-iterator.js (previously Panic)

New panics:

test/built-ins/Map/prototype/keys/returns-iterator.js [strict mode] (previously Passed)

[HalidOdat]

This is implemented in #1422 and many other spec function, so closing this.