fix(nm): Properly hoist nested workspaces

[larixer]

What's the problem this PR addresses?

Fixes #3429 by taking into account physical location on the filesystem of nested workspaces and not only their place in the dependency graph.

Avoids creating self-referencing symlinks for anonymous workspaces.

How did you fix it?

The place of nested workspaces on the file system are tracked now. The hoisting rule has been added to disallow workspace hoisting (because the workspace directory cannot be moved on the file system), while still allowing hoisting workspace dependencies freely.

Checklist

• I have read the Contributing Guide.

• I have set the packages that need to be released for my changes to be effective.

• I will check that all automated PR checks pass before the PR gets reviewed.

[larixer]

Noticed that anonymous workspaces became broken, back to draft

[larixer]

Noticed that anonymous workspaces became broken, back to draft

Disregard, I have confused Yarn with nested portals, I'm not sure how they should work at all

[larixer]

Noticed self-check violation in one of my projects, investigating...

[nicolo-ribaudo]

@larixer It looks like this PR also fixes #3518; it might be worth to add a test.

[larixer]

@nicolo-ribaudo Yes, this PR solves various cases with workspace nesting, by taking into account their nesting on the file system, which might be very different from nesting in the dependency graph. It needs more testing, because changes are not trivial

[larixer]

@nicolo-ribaudo I have checked this PR over several repos I have in addition to the integration and E2E tests we have i n the code, all my repos were installed correctly. The PR is ready for review.

[larixer]

@nicolo-ribaudo Seems the commit referencing this PR from your repo is failing the CI. Do you know if the problem is on our side or on your side?

[nicolo-ribaudo]

The failure is not related to this PR: it's either a bug in the constraints plugin or (way more likely) I did a mistake while rebasing that PR. I'll check later today.