[v4.x backport] test: run v8 tests from node tree

Checklist

• make -j4 test (UNIX), or vcbuild test nosign (Windows) passes
• commit message follows commit guidelines

Affected core subsystem(s)

tools

Description of change

This is a backport of https://github.com/nodejs/node/commit/cd720f816a86afa47afe4369e41a9c6c607a6f70 from https://github.com/nodejs/node/pull/4704 which enables running the V8 test suite on v4.x

ci: https://ci.nodejs.org/job/node-test-commit-v8-linux/157/

(there are currently 4 failures, not sure what they are related to)

/cc @nodejs/lts @nodejs/V8 @ofrobots @mhdawson