Avoid dynamic import when it's not needed

[nicolo-ribaudo]

Q	A
Fixed Issues?	Fixes #14186
Patch: Bug Fix?
Major: Breaking Change?
Minor: New Feature?
Tests Added + Pass?	Yes
Documentation PR Link
Any Dependency Changes?
License	MIT

This fixes #14186. It's the annoying segfault; the one that affects Babel/Webpack/Jest but V8 doesn't fix. In #14110 I added a workaround just for Jest, but since it also affects other projects this PR replaces the Jest workaround with another one. It will still crash in some cases, but only when using the --experimental-import-meta-resolve experimental flag with Jest or Webpack (hopefully no one relies on this combination, but otherwise there is not much that we can do other than 👍 the Node.js issue and the V8 bug).

@jlowcs Could you also try replacing line 26 of https://unpkg.com/browse/@babel/core@7.16.10/lib/config/files/import-meta-resolve.js with the following code, trigger a few CI runs, and see if it still works (it's a better fix from the one I already asked you to verify, because it doesn't affect the current Babel behavior other than avoiding crashes):

const resolveP = import_ && process.execArgv.includes("--experimental-import-meta-resolve")
    ? import_("data:text/javascript,export default import.meta.resolve").then(m => m.default || _importMetaResolve.resolve, () => _importMetaResolve.resolve)
    : Promise.resolve(_importMetaResolve.resolve);

[babel-bot]

Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/50858/

[nicolo-ribaudo]

Confirmed that this works - #14186 (comment).

Thanks everyone!