Add a test for QuickJS runtime options

[MahatiC]

As mentioned here #4344 (comment)

[MahatiC]

@achamayou Julien pointed out the existing test for this https://github.com/microsoft/CCF/blob/main/tests/js-custom-authorization/custom_authorization.py#L43-L69

The test values don't seem to match with the defaults set in the code though. I'm not yet sure at this point how the default values were derived.

Edit: On taking another look at it, the test values don't have to match the defaults. but still unsure on how the original defaults were derived.

[achamayou]

@MahatiC the idea is to allocate a lot less (*) than the limit, check it works, and more than the limit, and check it fails.

(*) too close and it will fail, because there will be other allocations we can't precisely control etc.

Ideally this test would call an endpoint that exposes the value, or use the config directly, and compute the values as limit - 50% and limit + 5% or something like that.

[achamayou]

For the stack size limit, an (large) recursive call is probably the best way to go.

[MahatiC]

Sure that makes sense, and I assume the current default heap size of 100 * 1024 * 1024 in the code was derived empirically?

[achamayou]

Yes, I think it was our default enclave heap size for a long time.

[achamayou]

Done in #5594 and #5668