Add goja escape assertions

[inancgumus]

What?

• Adds assertions for goja value escapes to ExecutionContext.
• Marks the failing tests as skipped until we fix them all.

Note that this will be added to the fix/goja-execctx-eval branch. Then, we'll fix the failing tests in other PRs (See #1182). So it's safe to approve this.

Why?

• To ensure that no Goja value escapes to ExecutionContext.

Checklist

• I have performed a self-review of my code
• I have added tests for my changes
• I have commented on my code, particularly in hard-to-understand areas

Related PR(s)/Issue(s)

Updates: #1182

[ankur22]

LGTM, thanks!