fix(boa): fixes panic on bigint size

[neeldug]

This Pull Request fixes/closes #1401.

It changes the following:

• adds crude memory check on bigint bitsize
• throws range error if exceeds 1B bits

[neeldug]

@Razican @RageKnify wanted to get your thoughts since I wanted to do this approx memory check using Log2, but it's unimplemented on num-bigint, and the issue seems untouched, I'd give it a go but haven't got the time to create the docs/efficient implementation at the time.

[neeldug]

Weirdly enough this caused this to happen:

Test262 conformance changes:

Test result	master count	PR count	difference
Total	78,897	78,897	0
Passed	28,323	28,322	-1
Ignored	15,614	15,614	0
Failed	34,960	34,961	+1
Panics	2	2	0
Conformance	35.90%	35.90%	-0.00%

Broken tests:

test/built-ins/Map/prototype/set/append-new-values-normalizes-zero-key.js (previously Passed)

[RageKnify]

Minor suggestion for readability, but it might make it look weird. Not sure about the test, don't see how it can possibly be affected.