[18.x] vm: backport vm-related fixes

This backport includes the patches of Symbols as WeakMap keys from https://bugs.chromium.org/p/v8/issues/detail?id=12947 and the following PRs:

• https://github.com/nodejs/node/pull/49855
• https://github.com/nodejs/node/pull/48943
• https://github.com/nodejs/node/pull/49874
• https://github.com/nodejs/node/pull/49391
• https://github.com/nodejs/node/pull/48510
• https://github.com/nodejs/node/pull/49671
• https://github.com/nodejs/node/pull/49710
• https://github.com/nodejs/node/pull/49950
• https://github.com/nodejs/node/pull/50137