[v16.x] src: add support for externally shared js builtins#45867

mhdawson wants to merge 1 commit intonodejs:v16.x-stagingnodejs/node:v16.x-stagingfrom

mhdawson:backport44376-to-v16.xmhdawson/io.js:backport44376-to-v16.xCopy head branch name to clipboard