This PR removes the CopyProperties() hack in the vm module, i.e., Contextify.
Instead, it uses different V8 API methods, that allow interception of
DefineProperty() and do not flatten accessor descriptors to
property descriptors.

Move many known issues to test cases. Factor out the last test in
test-vm-context.js for
#10223
into its own file, test-vm-strict-assign.js.

Part of this CL is taken from a stalled PR by
https://github.com/AnnaMag
#13265

Refs: #6283
Refs: #15114
Refs: #13265

Fixes: #2734
Fixes: #10223
Fixes: #11803
Fixes: #11902

This PR requires a backport of
37a3a15 otherwise some tests will fail. Cherry pick PR.

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

src

Checklist

• make -j4 test (UNIX), or vcbuild test (Windows) passes
• tests and/or benchmarks are included
• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

src